It took four major offensives between January and May 1944 before the line was eventually broken by a combined assault of the Fifth and Eighth Armies (including British, American, French, Polish, and Canadian corps) concentrated along a twenty-mile front between Monte Cassino and the western seaboard.
Det tog fire store offensiver mellem januar og maj 1944 før linjen blev brudt af et kombineret angreb af 5th og 8th Army (inklusiv britiske, amerikanske, franske, polske og canadiske korps) koncentreret langs en 32 km lang front mellem Monte Cassino og vestkysten.