\x34Historically Yours\x34 by Liz Davis is a blog about American historical trivia--anything American since 1492.
September 21, 1780
Arnold's act of treason
After the death of his first wife, Benedict Arnold met and married Peggy Shippen, the daughter of a Loyalist sympathizer. Through her he began a correspondence with John Andre who was a major in the British army. Arnold and Andre met in person on September 21, 1780, to finalize plans for the British takeover of West Point.