American missions against Umboi Island (Rooke, Rook)
September 19, 1942–February 12, 1944

September 19, 1942
(5th AF) B-17s attack cargo vessels near Umboi (Rooke).

October 7, 1943
(5th AF) B-24 on patrol bombs Umboi Island (Rooke) and scored damaging hits on several buildings.

February 12, 1944
(USMC) Company B, 1st Battalion, 1st Marine Division lands on Umboi Island (Rooke) but find it unoccupied as the Japanese withdrew months early December 1943.