Japanese twin-engined level bombers and dive bombers, claiming five aircraft downed from 24 to 28 February 1942. In June 1942 was involved in the defence of Sydney Harbour during the attack on Sydney Harbour. On 11 November 1942, Bengal was escorting the Dutch tanker Ondina to the southwest of Cocos Islands in the Indian Ocean. Two Japanese commerce raiders armed with six-inch guns attacked Ondina. Bengal fired her single four-inch gun and Ondina fired her 102 mm and both scored hits on Hōkoku Maru, which shortly blew up and sank. On 12 Feb 1944, the Japanese submarine RO-110 was depth charged and sunk east-south-east off Visakhapatnam, India by the Indian sloop and the Australian minesweepers HMAS Launceston and HMAS Ipswich (J186). RO-110 had attacked convoy JC-36 (Colombo-Calcutta) and torpedoed and damaged the British merchant Asphalion (6274 GRT). On 12 August 1944 the German submarine U-198 was sunk near the Seychelles, in position 03º35'S, 52º49'E, by depth charges from and the British frigate HMS Findhorn. Collaboration with the Axis powers Several leaders of the radical revolutionary Indian independence movement broke away from the main Congress and went to war against Britain. Subhas Chandra Bose, once a prominent leader in the Indian National Congress, volunteered to help Nazi Germany and Japan; he claimed in speeches that Britain's opposition to Nazism and Fascism was "hypocrisy", since Britain was itself denying individual liberties to Indians. Moreover, he argued that it was not Germany and Japan but the British Raj which was the enemy, since the British were over-exploiting Indian resources for the war. Bose suggested that there was little possibility of India being attacked by any of the Axis powers provided it did not fight the war on Britain's side. Nazi Germany was encouraging but gave little help. Bose then approached the Japanese Empire at Tokyo, which gave him control of Indian forces it had organised. The Indian National Army (INA), formed first by Mohan Singh Deb, consisted initially of prisoners taken by the Japanese in Malaya and at Singapore who were offered the choice of serving the INA by Japan or remaining in very poor conditions in POW camps. Later, after it was reorganised under Subhas Chandra Bose, it drew civilian volunteers from Malaya and Burma. Ultimately, a force of under 40,000 was formed, although only two divisions ever participated in battle. Intelligence and special services groups from the INA were instrumental in