Conversation so far:
What can you tell me about The Valley?
Shenandoah Valley.
What is the valley and appomattox?
CANNOTANSWER.
What happened in The Valley?
In the Valley Campaigns of 1864, they pursued the Confederates at the Third Battle of Winchester.

Question: Did they win against the confederates?
Self-contained rewrite: Did George Armstrong Custer win against the confederates