Complex sentence: Soldiers who didn't reenlist left in December, 1864, and the regiment was consolidated into a battalion of six companies, which received the members of the 114th, 116th and 133rd New York Volunteer Infantry Regiment.
Split into simpler sentences: Soldiers who didn't reenlist left in December, 1864. The regiment was consolidated into six companies, which received members of the 114th, 116th and 133rd New York Volunteer Infantry Regiment.