Friedrich August Schack (born 27 March 1892, Schmiedeberg im Riesengebirge/Silesia (now Kowary), died 24 July 1968, Goslar) was a General of Infantry best known for his pyrrhic defense of Caen after the allied invasion, September 1944, and for his brief leadership of the LXXXI Army Corps defending Aachen and the Siegfried Line.