This Day In History: 09/21/1780 - Benedict Arnold's Betrayal

In this This Day in History video clip, learn about different events that have occurred on September 21. Some of these events include the New York Sun publishes an article and Monday Night Football premieres. Also, the Galileo space probe crashes and Benedict Arnold commits treason.

1:00m watch

Related Videos

The Activists Who Removed Homosexuality from the Diagnostic and Statistical Manual of Mental Disorders

The DSM once labeled homosexuality a mental disorder. In the 1960s, LGBTQ+ activists Barbara Gittings and Frank Kameny pushed to change that, helping spur its removal from the DSM in 1973.

'Between a Rock and a Hard Place' May Have Originated in the Odyssey

The common phrase may trace back to a perilous moment in Greek myth.

America's Terrifying Battle to Control the Seas

The story of how America’s battle to control the seas against the terrifying German U-boats in the Atlantic and Japan’s fearsome Navy in the Pacific ultimately turns the tide of the war. See more in this clip from Season 1, Episode 5, "The War at Sea."

Preview: Guadalcanal

See what’s to come in the new episode of World War II with Tom Hanks, premiering Mon., June 8 at 8/7c and streaming the next day.