when was the first atom bomb dropped on japan by us
Atomic bombings of Hiroshima and Nagasaki
During the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9 , 1945 , respectively . The United States had dropped the bombs with the consent of the United Kingdom as outlined in the Quebec Agreement . The two bombings killed at least 129,000 people ( most of whom were civilians ) and remain the only use of nuclear weapons in the history of warfare . 
During the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9 , 1945 , respectively . The United States had dropped the bombs with the consent of the United Kingdom as outlined in the Quebec Agreement . The two bombings killed at least 129,000 people ( most of whom were civilians ) and remain the only use of nuclear weapons in the history of warfare .
During the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities on August 6 and 9 , 1945,  and remain the only use of nuclear weapons in the history of warfare.
During the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9 , 1945 , respectively . The two bombings killed at least 129,000 people ( most of whom were civilians ) and remain the only use of nuclear weapons in the history of warfare .
The first of the two nuclear weapon bombings the United States dropped on Japan was during the final stage of World War II on August 6th, 1945.
During the final stage of World War II , the United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9 , 1945 , respectively . The two bombings killed at least 129,000 people ( most of whom were civilians ) and remain the only use of nuclear weapons in the history of warfare .