Oct. 21, 1967: Vietnam War: More than 100,000 war protesters gather in Washington, D.C. A peaceful rally at the Lincoln Memorial is followed by a march to The Pentagon and clashes with soldiers and U.S. marshals protecting the facility.

Oct. 21, 1967: Vietnam War: More than 100,000 war protesters gather in Washington, D.C. A peaceful rally at the Lincoln Memorial is followed by a march to The Pentagon and clashes with soldiers and U.S. marshals protecting the facility.