As the Vietnam War dragged on and American casualties mounted, opposition to the war grew substantially in the United States. Many prominent musicians began openly criticizing the war through protest songs. Songs like "Ohio" by Crosby, Stills, Nash, and Young and "War" by Edwin Starr expressed dissent towards the war and the killing of protesters. The anti-war movement utilized protest music as a way to voice opposition and rally more people against American involvement in Vietnam.