South Florida's Johnnie Jones recovered a fumble by Army's Brandon Shode. The Army miscue setup another Gamatica field goal, this time from 32-yards out.
A DeJuan Green ran 2-yard touchdown run put the Bull's up 13-0 at the half. Army held Green to just 10 yards in 5 carries.
South Florida's efficient passing game helped them drive down the field and score on a 3-yard run by Clento Crossley. The two point conversion which was successful with a pass to Elgin Hicks to put the Bulls up 21-0 over Army. Crossley went on to rush for 65 yards on 13 carries for the Bulls.
Army falls to 0-4. The Black Knights travel to Texas Christian University next Saturday.
South Florida improves to 2-1. The Bulls host Louisville next.