Operation DIADEM - Fourth Battle for Cassino

Thursday, 11 May, 1944 - Monday, 5 June, 1944
Three German prisoners walking back through the Allied lines at Cassino in Italy, May 1944

Operation DIADEM was the code name for the Allied spring offensive in Italy in 1944 and included the Fourth Battle of Cassino. General Alexander's intention was to destroy the right wing of the German Tenth Army, drive the remnants of Fourteenth Army to the north of Rome, and then pursue the Germans, all the while inflicting maximum losses on them, as they withdrew to their defensive line that ran from Rimini to Pisa - the Gothic Line.