On May 20, 1969 the real battle of Hamburger Hill ended after 10 days. Although heavily fortified by the North Vietnamese, the hill was of little strategic value but the American command ordered a direct assault. The battle would involve about 1,800 men, and ten batteries of artillery. The Air Force flew 272 support sorties dropping 450 tons of bombs and 69 tons of napalm. The hill would be abandoned June 5th. The stupidity of the battle enraged Americans.