Question: how many tons of bombs were dropped on iwo jima?
Answer: Then, for two weeks beginning in late January, Seventh Air Force bombed Iwo Jima day and night, and B-29s struck it twice. In all, U.S. forces dropped 6,800 tons of bombs and fired 22,000 rounds of 5-inch to 16-inch shells prior to the invasion, the heaviest bombardment of the Pacific war.