About how many Americans served in the armed forces during world war 2
11 million
14 million
19 million
15 million

comparative method

hope this : )

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.