Home State: Florida
Command Billet: Commanding Regiment
Branch of Service: Infantry
Unit: 2nd Florida Infantry
He mustered as Private in Company E, 2nd Florida Infantry on 13 July 1861. One unverified source has him as a Sergeant at Sharpsburg. He was probably commissioned Lieutenant, date not given.
On the Campaign
According to Captain Ballantine, he commanded the remains of the Regiment on 17 September 1862 after the Captain was wounded. Geiger was captured in action at Sharpsburg.
The rest of the War
He was later exchanged. He was elected Captain on 5 January 1864.
References & notes
Basic information from the State of Florida1, which only has his initial enlistment date; no mention of any commissions. Details from his Compiled Service Record at the US Archives. He is listed only as "Lt. Geiger" by the Official Records in the Order of Battle.