From the beginning of the war, Americans were divided about their involvement in the conflict. While many hoped to preserve their neutrality, others rushed to volunteer, often in roles related to medical care or humanitarian aid. Poetry was a powerful vehicle for expressing a range of political positions, and was deliberately used to manage public opinion on America’s entry to the war in April 1917. This chapter examines the impact of war poetry on the politics and cultural attitudes of Americans in the 1910s. It also explores how the themes and motifs of the war became embedded in the subjects and methods of American poets throughout the twentieth century.