The next series of battles were efforts to breach the Winter Line and became part of the opening phase of the Battle of Monte Cassino. On 19 January 1944, the division made three attempts to cross the Garigliano, at the confluence of the rivers Liri and Gari. The swift current and German resistance defeated these efforts. DUKWs, which had been available, had been withdrawn for training exercises to prepare for the upcoming landing at Anzio and were sorely missed. While the division's attack failed, it helped in drawing vital German reinforcements towards it and away from the Anzio area. The failed attack potentially hindered an American attack that occurred the next day, during the Battle of Rapido River, as the 46th had not captured vital terrain on the American southern flank. The 56th (London) Infantry Division, to the 46th's south, had secured a bridgehead across the Garigliano and the 46th Division crossed the river. On the night of 26/27 January, the division launched an attack into the Aurunci Mountains near Castelforte. The fighting continued until 10 February, by which point the division had captured a series of hilltops and helped push back the German 94th Infantry Division.