Complex sentence: Kirkland was assigned to the command of another brigade in Robert F. Hoke's Division in August 1864, he served under James Longstreet at Richmond, taking part in the attack on Fort Harrison in October 1864.
Split into simpler sentences: Kirkland was assigned to the command of another brigade in Robert F. Hoke's division in August 1864. He served under James Longstreet at Richmond, taking part in the attack on Fort Harrison in October 1864.