 After some time, mopping up operations resulted in 220 Americans and 460 Filipinos killed compared with 6,400 Japanese dead.Alongside the Zamboanga operation, smaller units of the combined soldiers of the Philippine Commonwealth Army's 6th, 101st and 102nd Division and the U.S. Army's 41st Division invaded the Sulu Archipelago, a long stretch of islands reaching from the Zamboanga Peninsula to North Borneo.Rapidly taken in succession were Basilan, Malamawi, Tawi-Tawi, Sanga Sanga and Bongao.