During the mid-1960s, u. s. participation in the vietnam war resulted in

Massive protest movements against the war.

Many of the protests began on college campuses. Students for a Democratic Society was a key organization involved in planning and staging many demonstrations. Beyond college campuses, many other protests occurred as well. Protest songs became part of the popular music scene, with songs such as "Universal Soldier" by Donovan (1965), "For What It's Worth" by Buffalo Springfield (1966), and "Fortunate Son" by Creedence Clearwater Revival (1969). In 1967, a group was founded that was known as Vietnam Veterans Against the War, whose membership numbers grew to over 10,000 by 1971.