Conversation so far:
what happened in Hanover?
A courier reported that Farnsworth's Brigade had been attacked by rebel cavalry from side streets in the town.
what happened in Abbotstown?
two hundred horsemen, came racing down the country road" after Custer and his men.
He lost half of his men in the deadly rebel fire.
where is Hanover located?
Pennsylvania.
where is Abbottstown located?
Pennsylvania.
was there a battle in Hanover?
Custer deployed his troops and began to advance.
After a brief firefight, the rebels withdrew to the northeast.

Question: in what year was he in Hanover?
Self-contained rewrite: in what year was Custer in Hanover?