Original: 1968 & ndash ; Vietnam War : The United States Department of Defense announces that the U.S. Army and U.S. Marine Corps will send about 24,000 soldiers and Marines back to Vietnam for involuntary second tours of duty in the combat zone there .
Simplified: 1968 - Vietnam War : 27 soldiers are arrested at the Presidio in San Francisco for their peaceful protest of stockade conditions and the Viet Nam War .