||Participated at the Battle of Jutland, formed 2nd Squadron together with Schleswig Holstein
||Used as a training ship.
||Operations at Hela.
|Oct 1939 - Mar 1940:
||Used to train new officers.
Protects minesweepers off the coast.
||Withdrawn from service, used as a dormitory ship in Gotenhafen (Gdynia).
|January - March 1941:
||Used a an ice-breaker with reduced crew.
|May - October 1941:
||Together with Schleswig Holstein
and the 6th E-Boat Flotilla, the Schlesien
covers mine laying operations in the Baltic Sea to prevent a breakthrough of Russian ships to Britain.
||Additional Flag guns installed.
|March - April 1945:
||Used in the Battle for Gotenhafen (Gdynia).
||Moved to Swinemünde with over 1000 wounded men.
||Hit by a mine at Zinnowitz, NW of Swinemünde. The ship is beached.
||Blown up, the wreck was broken up between 1949 and 1956.