Operation Inmate was an attack by the British Pacific Fleet against Japanese positions on Truk Atoll in the central Pacific Ocean during the Second World War. The attacks against the isolated islands on the 14th and 15th of June 1945 were conducted to provide combat experience for the aircraft carrier HMS Implacable and several of the fleet’s cruisers and destroyers ahead of their involvement in more demanding operations off the Japanese home islands.
On June 14th, 1945, British aircraft conducted a series of raids against Japanese positions at Truk. The next morning, several islands were bombarded by British and Canadian cruisers, though only one of the four warships involved achieved any success. Further air strikes took place in the afternoon and night of June 15th before the Allied force returned to its base.
The attack on Truk was considered successful for the Allied force, with the ships and air units gaining useful experience while suffering two fatalities and the loss of seven aircraft to combat and accidents. The damage to the Japanese facilities in the atoll, which had been repeatedly attacked during 1944 and 1945, was modest.