Use the words constitution, republic, and amendment to describe the
United States government.

The united states of America is a constitutional Republic whose people vote leaders into office to protect their amendments.

Explanation:

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.