Failure by the 8th Army to capture Orsogna however put an end to the Allied plans of a strong drive up the eastern coast. Rain, flooded rivers, and high casualties, as well as the departure of General Montgomery, all put a halt to Allied plans until the spring of 1944. The Gustav Line thus fulfilled the wishes of Field Marshal Kesselring of keeping the Allies south of the so-called Winter Line. On the western side of the Apennines were two subsidiary lines, the Bernhardt Line in front of the main Gustav positions, and the Hitler Line some 8 kilometres (5 mi) to the rear. The Winter Line was fortified with gun pits, concrete bunkers, turreted machine-gun emplacements, barbed-wire and minefields. It was the strongest of the German defensive lines south of Rome. About 15 German divisions were employed in the defence. It took the Allies from mid-November 1943 to June 1944 to fight through all the various elements of the Winter Line, including the well-known battles at Monte Cassino and Anzio. The offensive on the Bernhardt line was launched on December 1, 1943, as part of Operation Raincoat. British and American troops took the terrain around Monte Camino and the Mingano Gap within a week and a half of launching the assault but German operations persisted in the area for months. Some authorities define the Bernhardt Line as crossing Italy from coast to coast following not just the western defensive positions described above but incorporating also the eastern defences of the Gustav Line. Other authorities use the Winter Line name interchangeably with the Gustav Line as defined above.