After the Allies had invaded France in 1944, some B1s were recaptured. Several were used on an individual and incidental basis by resistance forces, such as those fighting the German garrison of Paris in August 1944. On 7 October 1944, the Provisional Government of the French Republic formed the 13th Dragoon Regiment of the Free French Forces. The majority of the regiment fielded SOMUA S35 cavalry tanks, but Captain Edmond Voillaume's 2nd Company was equipped with 19 B1 bis tanks, which included a mixture of standard and German modified B-2s. They were stationed in Orléans until 2 April 1945, when they were mobilized for the Allied siege of La Rochelle.