Conversation so far:
Did Joshua Chamberlain participate in the Battle of Gettsyburg?
Chamberlain became most famous for his achievements during the Battle of Gettysburg.
What was Chamberlain's rank?
Col.
Chamberlain.

Question: For which side did Chamberlain fight?
Self-contained rewrite: For which side did Chamberlain fight for during the Battle of Gettysburg?