When the U.S. Fifth Army's breakout offensive began on 25 May 1944, the 1st SSF was sent against Monte Arrestino, and attacked Rocca Massima on 27 May. The 1st SSF was given the assignment of capturing seven bridges in the city to prevent their demolition by the withdrawing Wehrmacht. During the night of 4 June, members of the 1st SSF entered Rome, one of the first Allied units to do so. After they secured the bridges, they quickly moved north in pursuit of the retreating Germans.