bravely as a secret agent with the Special Operations Executive (SOE) in France, but was eventually betrayed and captured. Many of these Indian airmen were seconded or transferred to the expanding IAF such as Squadron Leader Mohinder Singh Pujji DFC who led No. 4 Squadron IAF in Burma. During the war, the IAF experienced a phase of steady expansion. New aircraft added to the fleet included the US-built Vultee Vengeance, Douglas Dakota, the British Hawker Hurricane, Supermarine Spitfire, Bristol Blenheim, and Westland Lysander. Subhas Chandra Bose sent Indian National Army youth cadets to Japan to train as pilots. They went on to attend the Imperial Japanese Army Air Force Academy in 1944. In recognition of the valiant service by the IAF, King George VI conferred the prefix "Royal" in 1945. Thereafter the IAF was referred to as the Royal Indian Air Force. In 1950, when India became a republic, the prefix was dropped and it reverted to being the Indian Air Force. Post war, No. 4 Squadron IAF was sent to Japan as part of the Allied Occupation forces. Royal Indian Navy In 1934, the Royal Indian Marine changed its name, with the enactment of the Indian Navy (Discipline) Act of 1934. The Royal Indian Navy was formally inaugurated on 2 October 1934, at Bombay. Its ships carried the prefix HMIS, for His Majesty's Indian Ship. At the start of the Second World War, the Royal Indian Navy was small, with only eight warships. The onset of the war led to an expansion in vessels and personnel described by one writer as "phenomenal". By 1943 the strength of the RIN had reached twenty thousand. During the War, the Women's Royal Indian Naval Service was established, for the first time giving women a role in the navy, although they did not serve on board its ships. During the course of the war six anti-aircraft sloops and several fleet minesweepers were built in the United Kingdom for the R.I.N. After commissioning, many of these ships joined various escort groups operating in the northern approaches to the British Isles. and , each armed with six-high angle 4" guns, were present during the Clyde "Blitz" of 1941 and assisted the defence of this area by providing anti-aircraft cover. For the next six months these two ships joined the Clyde Escort Force, operating in the Atlantic and later the Irish Sea Escort Force where they