Complex sentence: On September 26, the regiment left Camp Vance and headed to Camp Dennison in Cincinnati, where it received arms and equipment, then proceeded to Kentucky, where it saw action at the Ivy Mountain in early November.
Split into simpler sentences: On September 26, the regiment left Camp Vance and headed to Camp Dennison in Cincinnati, where it received arms and equipment. It then proceeded to Kentucky, where it saw action at the Battle of Ivy Mountain in early November.