Conversation so far:
what happened to George Armstrong Custer in Hanover?
On June 30, 1863, Custer and the First and Seventh Michigan Cavalry had just passed through Hanover, Pennsylvania
what happened to George Armstrong Custer in Abbotstown?
Next morning, July 1, they passed through Abbottstown, Pennsylvania

Question: where is Hanover located?
Self-contained rewrite: where is Hanover located?