The sector in which most of the fighting in the overall offensive took place was the Seelow Heights, the last major defensive line outside Berlin.
In the meantime, RAF Mosquitoes were conducting large tactical air raids against German positions inside Berlin on the nights of 15 April (105 bombers), 17 April (61 bombers), 18 April (57 bombers), 19 April (79 bombers), and 20 April (78 bombers).