CDV of Union officer John F. Barthof 2nd USCT Infantry with Key West FL Backmark

CDV of Union officer John F. Barthof 2nd USCT Infantry with Key West FL Backmark. 
2nd USCT Infantry History.
OVERVIEW:
Organized at Arlington, Va., June 20 to November 11, 1863. Ordered to the Dept. of the Gulf December, 1863. Attached to District of Key West, Fla., Dept. of the Gulf, February, 1864, to July, 1865. Dept. of Florida to January, 1866.
SERVICE:
Duty at New Orleans, La., and Ship Island, Miss., till February 13, 1864. Ordered to Key West, Fla., February 13. Affair at Tampa, Fla., May 5. Operations on West Coast of Florida July 1-31. Expedition from Fort Myers to Bayport July 1-4. Expedition from Cedar Key to St. Andrew's Bay July 20-29. Fort Taylor August 21. Station No. 4 February 13, 1865. Attack on Fort Myers February 20. Operations in the vicinity of St. Mark's February 21-March 7. East River Bridge March 4-5. Newport Bridge March 5-6. Natural Bridge March 6. Duty in District of Florida till January, 1866. Mustered out January 5, 1866.
Regiment lost during service 3 Officers and 24 Enlisted men killed and mortally wounded and 11 Officers and 135 Enlisted men by disease. Total 173.