He actually reached the Elbe at Schandau, but as the Saxons were unable to break out, von Browne retired, having succeeded, however, in delaying the development of Frederick's operations for a whole campaign. In the campaign of 1757, he voluntarily served under Prince Charles Alexander of Lorraine who was made commander-in-chief, and on the 6th of May in that year, while leading a bayonet charge at the Battle of Prague, von Browne, like Schwerin on the same day, met his death. He was carried mortally wounded into Prague, and there died on the 26th of June.