WWI saw extensive propaganda use by both sides to promote and damage causes. There were 5 main propaganda techniques: bandwagon, testimonial, transfer, repetition, and emotional words. WWI poetry reflected romantic and graphic perspectives on the war. The US entry into the war in 1917 provided needed supplies and troops. The war ended on November 11, 1918 with Germany's surrender. The Treaty of Versailles formalized the end but its punitive terms planted seeds for future conflict.