On the January/April '64 roll, Zettler was absent for 6 days in late April. He attained rank of Sergeant at some point while in the 7th.

Sgt. Zettler was wounded at Trevillian Station, Va, on June 11th. No details. He was listed as present on the September/October roll in 1864. In the late fall of '64 he received a clothing issue.

No further records.