"Bayern" was commissioned midway through the war, and had a limited service career. The first operation in which the ship took part was an abortive fleet advance into the North Sea on 18–19 August 1916, a month after she had been commissioned. The ship also participated in Operation Albion in the Gulf of Riga, but shortly after the German attack began on 12 October 1917, "Bayern" was mined and had to be withdrawn for repairs. She was interned with the majority of the High Seas Fleet at Scapa Flow in November 1918 following the end of World War I. On 21 June 1919, Admiral Ludwig von Reuter ordered the fleet to be scuttled; "Bayern" sank at 14:30. In September 1934, the ship was raised, towed to Rosyth, and scrapped.