A regiment de marche (roughly 'marching regiment' in English) is a French temporary (provisional not permanent), regiment created for a specific campaign or other military purpose. Clayton describes a "batallion de marche" as comprising the 'fit trained personnel' of all the battalions from a two to three battalion regiment. This creation of a provisional unit may be undertaken because of manpower shortages on mobilisation if new drafts of conscripts and volunteers had not yet arrived. As a terminology, this is similar to the "(Service) Battalion" designation in use in the British Army in 1914-15 onwards. Such battalions were for war service only, having a temporary nature, like that of the fr:Bataillon de marche concept of the French Army.