Conversation so far:
What was Joshua Chamberlain known for?
Joshua Chamberlain became most famous for his achievements during the Battle of Gettysburg.
What happened to Joshua Chamberlain during the Battle of Gettysburg?
On July 2, during the Battle of Gettysburg, Joshua Chamberlain's regiment occupied the extreme left of the Union lines at Little Round Top.
Where was Joshua Chamberlain moved to during the Battle of Gettysburg?
Joshua Chamberlain's brigade, commanded by Col. Strong Vincent, was sent to defend Little Round Top by the army's Chief of Engineers, Brig. Gen. Gouverneur K. Warren.
What happened to Joshua Chamberlain's brigade men?
Time and time again the Confederates struck, until the Joshua Chamberlain's 20th Maine was almost doubled back upon itself.

Question: Who atacked his men
Self-contained rewrite: Who attacked Joshua Chamberlain's 20th Maine?