Original sentence: At various times the following units served with the Column: 1st Regiment California Volunteer Cavalry, 1st Battalion of Native Cavalry, and the 1st, 5th and 7th Infantry Regiments
Edited sentence: At various times the following units served with the Column: 1st Regiment California Volunteer Cavalry, 1st Battalion of Native Cavalry, and the 1st, 5th and 7th Regiment California Volunteer Infantry