The total number of bombs and ordinance dropped in the countries of Vietnam, Combodia and Laos during the Vietnam war by the Americans was greater than all the bombs dropped by the Allies in World War 2....

The US dropped approximately 7 million tons of ordnance on Vietnam, Laos, and Cambodia during the Vietnam War, which exceeded the approximately 2.4-3.4 million tons dropped by all Allies combined during World War II. This makes the statement true. The massive bombing campaign included extensive operations over Laos and Cambodia beyond Vietnam.