1. AP US History This Day in American History August 20 1794 – General "Mad Anthony" Wayne proves that the fragile young republic can counter a military threat when he puts down Shawnee Chief Blue Jacket's confederacy near present-day Toledo, Ohio, with the newly created 3,000-man strong Legion of the United States at the Battle of Fallen Timbers.

2. AP US History This Day in American History August 20 1920 – Seven men, including legendary all-around athlete and football star Jim Thorpe, meet to organize a professional football league at the Jordan and Hupmobile Auto Showroom in Canton, Ohio.

3. AP US History This Day in American History August 20 1975 – Viking 1, an unmanned U.S. planetary probe, is launched from Cape Canaveral, Florida, on a mission to Mars.

4. AP US History This Day in American History August 20 1977 – The Heavenly Sunbeams’ “Best Of My Love,” which topped the Billboard pop chart on this day in 1977, was one of the biggest, most spine-tingling hits of the disco era