The United States suffered the fewest military and civilian deaths during World War II because the war as fought in Europe and America became the last country to join the war in siding with Allies. It is estimated that about 420,000 American soldiers died in the war. Poland entered in war after its invasion by Nazi Germany 1939. Great Britain was one of the major countries that fought with Axis and suffered more casualties. Japan involvement in the Pacific Ocean and the bombing of Hiroshima and Nagasaki led the country to suffer deaths.
