Tinian was taken after the Battle of Tinian, against Empire of Japan, which began on July 24, 1944, and ended on August 1, 1944. The invasion of Tinian was mostly done from troops from Saipan. Seabee construction started during the invasion by the building wooden ramps for the Landing Vehicle Tracked, LVT on one small beach, as 90 percent of Tinian coastline is a cliff face.
