Complex sentence: In 1862 his battery was made a part of the Army of the Tennessee and took a distinguished part in the Battle of Shiloh, managing to save four of his six guns after the initial Confederate attack.
Split into simpler sentences: In 1862 his battery was made a part of the Army of the Tennessee and took a distinguished part in the Battle of Shiloh. Hickenlooper managed to save four of his six guns after the initial Confederate attack.