Complex sentence: Zalinski was mustered out of the volunteer service in September 1865 and recommended for an appointment in the regular army, where he was commissioned a Second Lieutenant in the 5th United States Artillery on February 23,1866.
Split into simpler sentences: Zalinski was mustered out of the volunteer service in September 1865 and was recommended for an appointment in the regular army. He was commissioned a second lieutenant in the 5th United States Artillery on February 23,1866.