Conversation so far:
Did Joshua Chamberlain participate in the Battle of Gettsyburg?
Joshua Chamberlain became most famous for his achievements during the Battle of Gettysburg.
What was Joshua Chamberlain's rank at the beginning of the Civil War?
Joshua Chamberlain was appointed lieutenant colonel of the regiment on August 8, 1862, under the command of Col. Adelbert Ames

Question: For which side did Chamberlain fight?
Self-contained rewrite: For which side did Joshua Chamberlain fight in the war?