During World War II, the Japanese established a garrison at Tanro-aw Hill in the island. On March 10, 1945, American and Filipino soldiers who were liberating the Philippines from Japanese occupation launched a task force from Mindoro to liberate the islands of Romblon and Simara. On March 12, elements from Companies B and C of the 19th Infantry, 24th Division of the US 8th Army landed in Simara led by 1st Lt. David B. Bernard. They were assisted by the USS Haas, skippered by Lt. Cmdr. A. M. White.