The later US bomber B-52 was used to bomb Vietnam, Cambodia and Laos with munitions that are still causing injuries to this day.
Total U.S. bomb tonnage dropped during: World War II = 2,057,244 tons Vietnam War = 7,078,032 tons (3-1/2 times WWII tonnage)
Bomb tonnage dropped during the Vietnam War amounted to 1,000 lbs. for every man, woman and child in Vietnam.
An estimated 3 million people were killed by the war, and over 1 million were wounded.
https://wikieducator.org/images/8/8b/VIETNAM_WAR_BACKGROUND.pdf
Laos is historically referred to as “Lan Xang,” the land of a million elephants. Today, it would be more accurate to call it the land of a million bombs.
the US military dropped 260 million cluster bombs – about 2.5 million tons of munitions – on Laos over the course of 580,000 bombing missions. This is equivalent to a planeload of bombs being unloaded every eight minutes, 24 hours a day, for nine years – nearly seven bombs for every man, woman and child living in Laos.
http://legaciesofwar.org/resources/books-documents/land-of-a-million-bombs/
The Vietnam War Is Over. The Bombs Remain.
https://www.nytimes.com/2018/03/20/opinion/vietnam-war-agent-orange-bombs.html
U.S. B-52 bombers are diverted from their targets in South Vietnam to attack suspected communist base camps and supply areas in Cambodia for the first time in the war. President Nixon approved the mission–formally designated Operation Breakfast–at a meeting of the National Security Council on March 15. This mission and subsequent B-52 strikes inside Cambodia became known as the “Menu” bombings. A total of 3,630 flights over Cambodia dropped 110,000 tons of bombs during a 14-month period through April 1970. This bombing of Cambodia and all follow up “Menu” operations were kept secret from the American public and the U.S. Congress because Cambodia was ostensibly neutral.
https://www.history.com/this-day-in-history/u-s-bombs-cambodia-for-the-first-time