Less than three months after Jutland, Scheer embarked on another operation in the North Sea; in the resulting action of 19 August 1916, "Westfalen" was torpedoed by the British submarine , but suffered minimal damage and was soon repaired. Further operations took place in September and October, though the fleet saw little activity in 1917. While the bulk of the fleet conducted Operation Albion in the Gulf of Riga in October 1917, the four "Nassau"s patrolled the eastern Baltic to block a potential British incursion to support Russia. In February 1918, "Westfalen" and "Rheinland" were detached from the High Seas Fleet and ordered into the Baltic Sea. Finland was revolting against Russian rule, and the two ships were to aid the Finns in the civil war. "Posen" joined them there in early April. On 11 April, "Rheinland" ran aground off the Åland Islands. Approximately 6,000 tons of guns, belt armor, and coal were removed in order to lighten her enough to be refloated, which was not accomplished until 9 July. "Rheinland" was never repaired, and instead saw the remainder of her service as a barracks ship in Kiel.