In late 1917, German light forces had begun raiding British convoys to Norway, prompting the British to send heavy escorts. This provided the German fleet with the opportunity for which it had been waiting the entire war: a chance to destroy an isolated portion of the Grand Fleet. The Germans had mistaken intelligence about the timing of the convoys, however, and failed to intercept one when they sortied in April 1918; "Nassau" was the only member of the class to take part in the operation. While returning from Finland in August, "Westfalen" was removed from active service for use as a gunnery training ship. The fleet saw little activity in the final months of the war and morale plummeted, leading to the Wilhelmshaven mutiny when it became clear that Scheer and Hipper intended to mount a last-ditch attack on the Grand Fleet in the last days of the war.