 Complete the following phrase:  Once the German Ardennes Offensive had been halted, 43rd W Division returned to the offensive in early 1945 in Operation Blackcock to reduce the Roer Triangle. The advance was supported by massive artillery concentrations, supplemented by 43rd W Divisions Pepperpots, involving 110th LAA Rgts Bofors guns, as well as MGs, mortars and tank guns. However, further exploitation was prevented by bad weather. The division then fought through the month-long battle of the Reichswald 