At the outbreak of the Second World War, the Indian Army numbered 205,000 men. Later on during the Second World War the Indian Army would become the largest all-volunteer force in history, rising to over 2.5 million men in size. In doing so the Indian III Corps, Indian IV Corps, Indian XV Corps, Indian XXXIII Corps, Indian XXXIV Corps, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 14th, 17th, 19th, 20th, 21st, and 23rd Indian Divisions were formed, as well as other forces. Additionally two armoured divisions and an airborne division were created. In matters of administration, weapons, training, and equipment, the Indian Army had considerable independence; for example, prior to the war the Indian Army adopted the Vickers-Berthier (VB) light machine gun instead of the Bren gun of the British Army, while continuing to manufacture and issue the older SMLE No. 1 Mk III rifle during the Second World War, instead of the Lee–Enfield No.4 Mk I issued to the British Army from the middle of the war.