The “Fallschirmjäger” had been, during the war, merged in the fighting systems of Luftwaffe for a much better coordination with the atmosphere forces. The conquest of Crete during procedure Merkur, in May 1941, was one of the primary successes of German paratroopers. Nevertheless the casualties had been therefore high that their usage had been usually limited to at the very top infantry part over as airborne troops. In March 1944, General Kurt Student's 1st Division Fallschirmjäger, holding their ground among the ruins of Monastery of Montecassino, strenuously resisted the advancing Allies. Their opposition had been therefore intense that they were nicknamed the “Green Devils”.