High Speed, Low Drag. The Joint Strike Force or J.S.F. is a large assault platoon based off of the United State's main armed forces within the strategic game of Tom Clany's ENDWAR. Withn Battlefield 3, we are all focused on organized offensive aggression against factions that we see hostile. The J.S.F. is now currently finding a way to get all of it's soldiers and officers onto Battlelog to beggin easier and better communication among each other. Recruitment is manditory so be sure to sign up now then later.