Claim: The Genzan Air Group (15 Nov 1940 – 1 Nov 1942) (15 Aug 1944 – the end of war) was an aircraft, airbase and naval garrison unit of the Japanese empire that was involved in the sinking  ships  and the bombings.
Evidence: 15 Nov 1940 – 1 Nov 1942
15 Aug 1944 – the end of war The Genzan Air Group (元山海軍航空隊, Genzan Kaigun Kōkūtai) was an aircraft and airbase garrison unit of the Imperial Japanese Navy Air Service during the Second Sino-Japanese War and Pacific campaign of World War II. The group was a key participant in the sinking of the British capital ships HMS Prince of Wales (53) and HMS Repulse (1916) off the coast of Malaya on 10 December 1941, losing one aircraft and its crew during the battle. On January 22, 1942, bombers from the Genzan Air Group attacked Kallang Airport in Singapore, and subsequently provided air support for Japanese offensives in Malaya including the landings at Endau. Imperial Japanese Navy Naval aviation unit Imperial Japanese Navy Air Service