The Char B1 was a French heavy tank manufactured before World War II and it is the heaviest French vehicle in FHSW. It was also, together with the Matilda II tank, the heaviest armored tank during the Fall of France and it got, together with the Char 2C, the heaviest armament during the Fall of France. This tank was a frightening for the Germans. Even the Pzkpfw III was not strong enough to damage the Char B1 heavy. The Char B1 was a specialised heavy break-through vehicle, originally conceived as a self-propelled gun with a 75 mm howitzer in the hull; later a 47 mm gun in a turret was added, to allow it to function also as a Char de Bataille, a "battle tank" fighting enemy armour, equipping the armoured divisions of the Infantry Arm. Starting in the early twenties, its development and production were repeatedly delayed, resulting in a vehicle that was both technologically complex and expensive, and already obsolescent when real mass-production of a derived version, the Char B1 "bis", started in the late thirties. Although a second uparmoured version, the Char B1 "ter", was developed, only two prototypes were built. Among the most powerfully armed and armoured tanks of its day, the type was very effective in direct confrontations with German armour in 1940 during the Battle of France, but slow speed and high fuel consumption made it ill-adapted to the war of movement then being fought. After the defeat of France captured Char B1 (bis) would be used by Germany, with some rebuilt as flamethrowers or mechanised artillery.
The Char B1 served with the armoured divisions of the Infantry, the Divisions Cuirassées de Réserve. These were highly specialised offensive units, optimised to break through fortified enemy positions. The mobile phase of a battle was to be carried out by the armoured divisions of the Cavalry, equipped with the SOMUA S35. The First and Second DCR had 69 Char B1's each; the Third 68. The 37th Bataillon de Chars de Combat, serving with 1DCR, was at first equipped with the original B1; these vehicles were refitted with the longer SA 35 gun in the spring of 1940. The turret type designation was changed to APX1A. The battalion was re-equipped with the Char B1 bis and in May reinforced by five of the original tanks.
After the German invasion several ad hoc units were formed: the 4DCR with 52 Char B1's and five autonomous companies (347e, 348e, 349e, 352e and 353e Compagnie Autonome de Chars) with in total 56 tanks: 12 B1's and 44 B1 bis. Also 28BCC was reconstituted with 34 tanks. The regular divisions destroyed quite a few German tanks, but lacked enough organic infantry and artillery to function as an effective mobile reserve. A number of Char B1's (161) were captured by the Germans during the Fall of France. These were later pressed into service as second line and training vehicles under the name of Panzerkampfwagen B-2 740 (f). Sixty became platforms for flamethrowers as Flammwagen auf Panzerkampfwagen B-2 (f). Sixteen were converted into 105 mm self propelled artillery. Ordinary tank versions were also frequently modified. For example, additional armour was placed above the main gun, and a winch mechanism was added behind the turret. One unit, Panzer-Abteilung 213, was equipped with the Char B1 bis and deployed on the Channel Islands from 1941 to 1945. One of their tanks is displayed by the Bovington Tank Museum, though repainted in French colours.