The Atomic Bomb?
There can be no doubt that the most deadliest weapon of world war 2 was the nuclear bombs that dropped on Hiroshima.
The A-bomb.
musket
American Civil War
Yes, the Civil War was the deadliest war in American history, with an estimated 620,000 to 750,000 soldiers killed.
The American Civil War resulted in approximately 620,000 to 750,000 military deaths, making it the deadliest conflict in American history. This number exceeds the total American fatalities of World War I, World War II, the Vietnam War, and the Korean War combined. The staggering loss highlights the war's profound impact on the nation, both in terms of human cost and societal change. In comparison, World War II, the next deadliest conflict, resulted in about 405,000 U.S. military deaths.
hahahahaha
World War II is the deadliest war in history.
Deadliest battle America has been involved in to date was the Battle of Meuse-Argonne in WWI (26,277 deaths) Deadliest battle on American soil was Gettysburg in US Civil War (7,863)
Most likely it was the M-1 Rifle.
Adem Bomb dropped by American b12 bomber
Little known by today's generation; the deadliest naval weapon (discounting Kamikazes) of WWII was the oxygen fueled "Long Lance" torpedo.