The Royan Pocket, April 1945
Historic background
My attention was drawn to this interesting late war sideshow campaign by an odd photo which popped up on a French modeling group I follow of Facebook. The photo (below) was of a Somua S-35 accompanied by French soldiers in 1940 era kit, yet titled April 1945! It turns out The Free French had gathered up any repairable and reusable 1940 tanks they could find as the Allies advanced through France and built these into fighting units to use against the isolated German pockets left behind along the coast of France! Being a pack rat for knowledge about unusual french units and liking the idea of having my Somua back on the tabletop I did some digging, what follows is brief article/background based on some weeks of internet research.
Please check out my earlier piece on 13e Régiment de Dragoons 1944/45 for background info on this interesting unit.
https://baberonwargames.blogspot.com/2026/03/13e-regiment-de-dragoons-194445.html
With the somewhat chaotic collapse in the west during the summer of 1944, Hitler created a strategy to hold fortified "Atlantic pockets" as diversions and potential bargaining chips, isolated German garrisons were ordered to dig in along the coast, including in the Gironde estuary region around Royan.
In early September 1944, Forces Françaises de l'Intérieur (FFI) maquisards from Charente, Dordogne, and other regions, coordinated under Colonel Henri Adeline's command from September 6, intensified their operations to encircle remaining German strongholds. On September 12, 1944, FFI forces occupied Rochefort, cutting the vital land connection between the German garrisons at La Rochelle and Royan, thereby formally enclosing the Royan Pocket. This isolation encompassed the town of Royan, the Arvert Peninsula, the southern part of Oléron Island, and the northern Gironde estuary approaches, trapping approximately 20,000 German troops in a defensive perimeter fortified since 1942 as part of the Atlantic Wall.
The initial German defensive setup in the pocket was commanded by Oberst Hartwig von Pohlmann, who had taken charge of Festung Gironde Nord on June 1, 1944, with his command post at Villa Le Lys Rouge in Royan. Pohlmann immediately declared a state of siege following the conection to Rochefort being cut!
The area was organised in multiple lines of concrete bunkers, artillery batteries, including four 240mm/50 Modèle 1902 guns (with a range of 18 miles) taken off the old Danton class semi-dreadnought Condorcet following the scuttling of the French fleet at Toulon in late November 1942 at Batterie Gironde, minefields, and anti-tank positions to repel land assaults while also relying on the estuary's geography for protection. Supply challenges mounted rapidly due to Allied control of surrounding areas; the Germans maintained limited maritime contacts via blockade runners to the nearby Pointe de Grave fortress and occasional links to La Rochelle, supplemented from late October 1944 by nighttime air drops from Germany for essentials like medicine and mail, alongside local foraging and pre-stocked rations intended to sustain the garrison for up to six months.
Geography, Defenses and Terrain Layout
The Royan pocket encompassed a coastal enclave in southwestern France, centered on the town of Royan and extending across the eastern shore of the Gironde estuary. It included the Arvert peninsula to the south along the mainland, while the western boundary was formed by the Atlantic Ocean. The pocket was designated as Festung Gironde Nord, distinct from but defensively coordinated with the separate Festung Gironde Süd across the estuary (from Pointe de Grave northward). This divided layout focused on the northern sector, spanning coastal areas from Ronce-les-Bains in the north to Pointe de Suzac in the south, with the Gironde estuary itself serving as a formidable natural barrier, up to 5 kilometers wide in places, with navigable channels guarded by the rocky plateau of Cordouan, both isolating the pocket from inland advances and complicating amphibious operations. The terrain featured a mix of sandy beaches and exposed coastal stretches, and the rugged Côte Sauvage south of Pointe de la Coubre, which provided potential landing sites but were backed by dunes and low cliffs. Inland, dense forests like the Coubre forest dominated the northern sector, offering natural cover and difficult access through thick pine woodlands extending to Pointe de Suzac. Marshes and wetlands, particularly along the Seudre river to the east, acted as additional obstacles, flooding seasonally and channeling any ground movements into narrow, defensible corridors. Oléron Island, to the south, provided flanking artillery support but was a separate German-held position only connected to Rayon via radio and the occasional blockade runner.The overall northern sector covered roughly 150-200 square kilometers.
German Fortifications
The German fortifications in the Royan pocket formed an integral extension of the Atlantic Wall, designed to create an impregnable fortress capable of withstanding prolonged sieges and blocking access to the Gironde estuary. Construction began in August 1942 under the direction of the 2nd Fortress Pioneer Staff and the Organisation Todt, utilizing forced labor from German volunteers, Spanish prisoners and French workers to erect a network of concrete bunkers, casemates, and armored cloches along the coastline from Ronce-les-Bains to the Pointe de Suzac. These defenses were organized into three concentric lines: the coastal front with 43 support points featuring heavy batteries; an inner line around Vaux-sur-Mer, Royan, and Saint-Georges-de-Didonne with 135 light support points including trenches, machine-gun nests, and four Panzerwerke (Pzw I–IV) blocking key roads with anti-tank guns and mortars; and a rear line from Chaillevette to Taupignac, securing the Coubre forest with points 200–235.
The pocket held approximately 12,000-15,000 troops in the northern sector by late 1944, coordinated with 3,500 in the southern Gironde Süd. Artillery emplacements were a cornerstone of these defenses, with the Marine Artillerie Abteilung 284 and Heeres Küsten Artillerie Abteilung 282 deploying batteries ranging from 75 mm to 240 mm guns. Notable examples include the Batterie Gironde in the Coubre forest, armed with two 240 mm guns in armored turrets (range 27 km); the Batterie Cordouan at Pointe de Coubre with four 150 mm Krupp guns; and the Batterie Hindenburg at Fort du Chay, protecting Royan harbor with 75 mm and 76.2 mm casemated guns plus Flak units. Minefields were extensively laid along the forward lines and around support points, complemented by anti-tank obstacles such as dragon's teeth, barbed wire, stakes, and remote-controlled Goliath explosive charges, with Panzerwerke like Pzw III at Belmont featuring rotating armored cloches for all-around fire.
The Coubre forest served as a key rearward bastion, manned by the Tirpitz Battalion, comprising of some 800 sailors from ships sunk in the Gironde in August 1944 and fortified with all around defenses, radar stations, Tobruk turrets, and 50 machine-gun positions around its batteries. Royan city itself was heavily defended as the pocket's core, with urban bunkers, Flak towers camouflaged as houses and port defenses at Le Chay, housing approximately 5,500 troops across infantry, coastal artillery, and naval units under Konteradmiral Hans Michahelles by late 1944.
Logistical adaptations enabled sustained resistance despite encirclement, including ammunition and command bunkers for operational autonomy, as well as underground storage facilities within larger complexes like the Triloterie command post. Resupply was limited after September 1944, relying initially on sporadic sea runs from La Rochelle's U-boat base and blockade runners until early 1945, when Allied interdiction curtailed such efforts.
Opposing Forces
Allied Command and Units
The Allied effort to reduce the Royan pocket was directed by General Édgard de Larminat, commander of the French Forces of the West (Forces Françaises de l'Ouest, or FFO), which were established in October 1944 specifically to eliminate the remaining German Atlantic pockets. Under Larminat's oversight, the operation integrated French ground, naval, and air elements with limited American support, emphasizing coordinated multinational action to isolate and capture the German garrison. Key subordinates included Colonel Henri Adeline, who commanded the Royan sector and elements of the 10th Infantry Division, drawing on his prior experience leading French Forces of the Interior (FFI) in southwestern France. Colonel Jean de Milleret oversaw the assault on the Pointe de Grave sector, coordinating amphibious and ground advances across the Gironde estuary. The primary ground forces comprised approximately 30,000 French troops for the operation, organized into several divisions and irregular units, including colonial battalions and FFI former marquis.
The 10th Infantry Division, was formed largely from FFI resistants and regional recruits, provided infantry support for operations around Royan, focusing on clearing fortified positions. The 23rd Infantry Division, including the 50th and 158th Infantry Regiments, formed the core assault force in the Division de Marche Gironde, advancing through mined terrain and blockhouses. Elements of the French 2nd Armored Division (2Dble), equipped with american armour - Sherman tanks, M10 tank destroyers, etc and other independent French armoured formations (see notes below) supported the infantry.
FFI irregulars, organized into groupements such as Z, RAC, and Roland from the Armée Secrète, supplemented regular units with local intelligence and guerrilla actions. American contributions included elements of the 66th Infantry Division for containment duties in adjacent sectors and aerial support from the 447th Bomb Group of the US Army Air Forces, which conducted precision strikes on German defenses. Naval operations were led by Vice Admiral Joseph Rue, who commanded a fleet of ten Allied warships providing offshore bombardment to soften German coastal batteries ahead of the ground assault.
German Command and Units
The German forces in the Royan pocket operated under the broader command of the Atlantic Army Detachment, responsible for the remaining Atlantic coastal strongholds after the main German withdrawal from France in August 1944. Local command in Royan was held by Colonel Hartwig Pohlmann, while Rear Admiral Hans Michahelles oversaw the overall pocket, including coordination with adjacent positions like the Pointe de Grave. Troop strength in the Royan pocket totaled approximately 8,000–9,000 men across the isolated enclave, with around 5,500 concentrated in the Royan area itself; this included a mix of Wehrmacht infantry, Kriegsmarine sailors (such as elements of the Tirpitz Battalion), artillery crews, and forcibly enlisted foreign personnel from countries like Poland, Hungary, Romania, and others. Encircled since September 1944 following the Allied advance, the German garrison adopted a static defensive posture with minimal reinforcements possible due to the naval blockade and air superiority of Allied forces. Supplies were initially stockpiled for prolonged resistance, including food reserves sufficient for months and ample weaponry, but isolation led to deteriorating conditions, with resupply attempts limited to occasional night flights or neutral shipping that were largely intercepted. Morale among the defenders, a blend of regular army and naval units, was strained by the siege but sustained through fortified positions until the final assaults in April 1945.
Preparation
Whilst the plan to retake the pocket was formulated as early as September 1944, the gathering and organising of some 65,000 former member of the FFI delayed preparation, then came the german counter offensives in the Ardennes and Colmar during the winter of 1944/45 and the operation was postponed. A new plan “Operation Vénérable” was developed for spring 1945. The plan called for French forces to take the pocket supported by allied air forces and naval support. The French former resistance fighters spend months in intelligence gathering, conducting patrols, ambushes, and reconnaissance raids from autumn 1944 to map German positions, including details on minefields and gun emplacements often obtained through captured documents and local networks.
Finally From early January both British and US tactical bomber units began systematic high intensity raids against both the city and its defenses and emplacements. On the night of January 4-5 RAF bomber command dropped 1,576 tonnes of high explosives onto the city! But due to poor conditions no ground offensive was possible, but the build up continued. In April over the nights 14-15, 1,000 bombers of the US Eighth Air Force dropped 2,551 tonnes of conventional ordinance as well as clusters of 85 gallon Napalm canisters onto the city and its defenses (this being the first recorded combat use of Napalm in NWE). These airstrikes were supported and coordinated with French ground forces who focused on demolishing concrete bunkers and artillery emplacements in the Festung Gironde Mündung Nord.
Complementing the air campaign, Free French naval forces under French Vice-Admiral Joseph Rue also took part in the battle. The admiral had a fleet of 10 warships centered around the battleship Lorraine along with the heavy cruiser Duquesne, destroyers Alcyon, Basque and Fortuné, destroyer escort Hova, frigates Aventure, Decouverte and Surprise, and sloop Amiral Mouchez. The fleet conducted heavy shore bombardment starting on April 15, 1945, firing a total of 27,000 artillery shells (Lorraine alone fired 236 x 13.4 inch shells, 192 x 5.5 inch shells and 538 x 75mm shells) over five days at German positions around Royan and the Gironde estuary mouth.
Ground Operations and Surrender
The ground phase of Operation Vénérable commenced on 14 April 1945, following intensive aerial and naval bombardments that softened German defenses in the Royan pocket. Under the overall command of Général de Division Edgard de Larminat, the assault was primarily executed by French forces of the 10ème Division de Marche d'Infanterie (10th Infantry Division), reinforced by elements of the 2ème Division Blindée (2Dble), including tank units from the 12ème Régiment de Cuirassiers and tank destroyers from the Régiment Blindé de Fusiliers-Marins. These troops advanced from positions near Le Chay and Médis, targeting the German outpost line along the Arvert Peninsula to establish a base for the main push into Royan. Supported by artillery barrages and close air support from Allied aviation, the initial advances captured forward positions such as Semussac and Trignac, with reconnaissance patrols identifying heavily fortified strongpoints equipped with mines, barbed wire, blockhouses, and anti-tank guns. On 15 April, the main infantry assault intensified, with battalions like the Bataillon de Marche n°2 (BM 2) breaching minefields at objectives codenamed B.1 (Boube), B.2 (La Grange/Brandes), and B.3 (Moulins-de-Didonne) near Didonne. Accompanied by B1 bis tanks of 2/13e Régiment de Dragoons and Bren carriers, French voltigeur companies overran these positions in close-quarters fighting, capturing over 100 German prisoners and neutralizing blockhouses while advancing several kilometers toward Royan. Further engagements occurred in the Coubre forest area, where Allied troops clashed with the German ailors from the Tirpitz battalion manning bunkers, resulting in heavy combat amid dense terrain that favored defenders. By evening, French forces from the 4ème Régiment de Zouaves and BM 2 reached the suburbs of Royan, linking up with armored elements and securing La Triloterie after destroying fortified casemates armed with 88mm guns. These actions pierced the main German lines, though they came at a cost, with BM 2 alone suffering 23 killed and 84 wounded in the day's fighting. The following day, 16 April, French units conducted cleanup operations east of the Royan road and along the coastal marsh, capturing additional prisoners and clearing minefields while establishing defensive positions facing the city center. By 17 April, the German commander, Konteradmiral Hans Michahelles, capitulated in Royan, yielding approximately 8,000 prisoners from the pocket's garrison.
Remaining resistance at Pointe de Grave, across the Gironde estuary, was assaulted on 20 April by troops under Général de Division Robert de Milleret, who overran the fortified peninsula after coordinated artillery and infantry advances, securing the southern flank.
The pocket was fully cleared by late April, with the amphibious assault on Île d'Oléron, codenamed “Operation Jupiter III” was launched on 30-31 April by French commando and marine units, supported by ample offshore naval gunfire and air support. The island was taken against some opposition from its 2,000+ defenders; two Somua S-35s from 13e RD were ferried over to the island to assist the marines and commandos in their task. This completed the reduction of the Royan enclave just days before VE Day on 8 May 1945, allowing the cancellation of the planned assault on nearby La Rochelle under “Operation Mousquetaire”.
Afterword
Casualties and Destruction
The Royan pocket campaign resulted in significant human and material losses for all parties involved. Allied forces suffered 346 killed, 1,501 wounded, and 32 missing during the ground assault from April 13 to 20, 1945. German defenders, numbering around 5,500 in the core Royan sector of the pocket, incurred heavy casualties, alongside the capture of 8,400 prisoners by the campaign's end on April 20. Civilian casualties were particularly devastating, as approximately 3,500 French residents remained in German-held areas, with 1,500 killed primarily during the Allied aerial bombardments. Material destruction was near-total in Royan, where heavy bombing by RAF and USAAF aircraft, totaling over 6,800 tons of ordnance, including napalm, razed more than 90% of the city, burning 500 houses and reducing public monuments like Notre-Dame Church to ruins.
French military leaders insisted on a forceful assault over awaiting the pocket's inevitable surrender, prioritizing a symbolic national liberation to bolster post-war prestige, despite the evident risks to civilians and infrastructure in the largely evacuated resort town. In its legacy, the Royan pocket stands as a poignant symbol of France's broader liberation, highlighting the pivotal role of reconstituted French units like the Forces Françaises de l'Intérieur (FFI) and armored divisions in reclaiming sovereignty from Nazi holdouts.
This era also illuminated overlooked civilian ordeals, with thousands enduring the raids' terror, while unit-specific contributions, such as Leclerc's tanks breaching defenses, affirmed the French Army's integral place in the Allied victory narrative.
My Game
After researching this fascinating piece of history I felt compelled to create some sort of tabeltop game losely based on the fighting around Royan.
This is a composite game based on my reading of the units combat reports, I have taken some liberties with the German organisation.
Silencing the Battery at Les Huttes
Following the capture of Royan and the surrender of Admiral Michahelles, the French then turned their attention to the south side of the Gironde Estuary. The Germans had fortified this side in a similar way to the Royan (North) bank, and their batteries and forts still effectively close the estuary to traffic. 1st Squadron of the 13th Dragoons were taken by train to Grayan and then attached to the infantry units assigned to clearing the southern shore of the estuary right up to Pointe de Grave. The advance started on 18 April and the French met some solid and determined defence, from a desperate enemy, isolated and alone, but with ample ammunition in well prepared positions!
By 19 April the French had broken through the outer line, but now found themselves facing two battery strong-points one each side of the isthmus – Les Huttes and Arros! These two well positioned forts not only could fire out to sea (Arros) or bring fire on vessels in the estuary (Les Huttes), but effectively prevented access to Pointe de Grave as they sat either side of the only road up the isthmus.
The Scenario
1/13e RD are tasked to support 13th & 14th Companies of Lieutenant-Colonel Durand`s 131st Infantry Regiment in their assault on the German battery at Les Huttes (commanded by Oberleutnant MA Helmut-Horst Molle).
The battery is concealed from the sea in a defilade position within the sand dunes and scrub of the peninsula. There is also a concrete command control bunker, and anti-aircraft defences. On the landward side the battery is protected by mine-fields, wire and MG positions.
German defenders
A mix of ex-Kriegsmarine sailors and wehrmacht odds n`sods
Outer defence line (facing south) all start dug-in, trenches have overhead protection
2 weak platoons (9 men each inc LMG), 81mm mortar, sniper
The Germans deployed as per their game organisation whilst the French decided to commit 13 Company along with a squadron of Somua, an engineers platoon and the AT platoon straight up the road; whilst 14 company (again with a Somua squadron and engineer platoon) would advance up the right side of the table and once through the line of dragons teeth this force would advance up beach side of the isthmus headed straight for the battery. Both engineers platoons are tasked to clear mines and blast holes in the lines of anti-tank obstacles and wire, it is the job the of Somua squadrons of 13e RD to provide direct support and suppress German positions. The French company HQs can also call support fire from battalion mortars (including smoke) and the US FAC can call on close air support also.
Turns 1 & 2 the French advance under sporadic mortar fire, the 14 Company HQ manages to contact their attached mortars, but 13 Company and the FAC radios fail!
Turn 3 both flanking platoons (left and right) are hit by long range MMG from German bunkers, both platoons take casualties. 14 Coy (on the right) call down smoke to mask their men.
This does alert the French to the presence of minefields and their engineers get to work trying to find and clear paths. 13 Coy still has problems with its radio, but the US FAC finally calls in TAC Air support!
Turn 5 the French engineers begin clearing lanes through the minefields.
The surviving Somuas continue to try and suppress the bunkers (still ineffective). The French infantry continue to take casualties from MG fire and dug-in Germans, and mortar fire.
14 Coy once again calls down smoke to mask their troops advance.
A P47 arrives over the table is is directed against the bunker on the French left.
The French decide to deploy their Pak40 against the bunker on the right.
Turn 6 on the right French infantry stumble into more unmarked mines!
But the Pak40 is bang on target and suppresses the Bunker with its first shot
On the left the P47 dives and unloads all over the bunker, it and its occupants are wiped out!
In the center the engineers have most cleared their paths, but take casualties from LMG and mortar fire!
Turn 8 The Pak40 lays another round into the bunker on the right, this time totally destroying it!
The French engineers start laying charges to blow gaps in the dragons teeth and roadblock!
On the far left and right, French infantry have worked their way around the edges of the minefields and pushed through the wire and dragons teeth. They still come under sporadic fire, but respond with their own LMGs and rifle grenades plus 80mm mortars.
A rifle grenade takes out this LMG nest
Turn 9 the engineers work continues only hampered by the odd 81mm mortar bomb. The infantry continue their advance, slowly gaining the upper hand against the remaining German defenders. The Pak40 limbers up and the FAC climbs aboard his jeep to move closer to the action.
Turn 10 the charges clear gaps in the dragons teeth and blast a hole through the road block
Turn 11 The German 50mm emplacement spots and fires on the lead Somua (miss), the french engineers burn out the last LMG nest covering the road.
Elsewhere across the table the French infantry and engineers advance virtually unopposed.
Turn 13 the French advance across the entire table front
Turn 14 Both French company HQs and the US FAC can all now see both the command & control bunker and the artillery battery! The French infantry and tank halt, and artillery, mortars and TAC Air are called down with a vengeance upon the Germans!!
Over the next 6 turns 81mm mortars, 105mm artillery and strafing and bombing runs by P47s and P38s effectively end the game!! One P47 is shot down, but I consider that a small price to pay in the long run.
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