November 30 1919, Jelgava–The truce between the Ulmanis government in Riga and the German forces in Latvia was fraying by the fall. The Latvians and the Allies were both losing patience in the German presence in the area nearly a year after the Armistice. Goltz attempted to keep them there by claiming that they were actually part of the West Russian Volunteer Army, under the command of one Bermont-Avalov, a committed czarist. This did not convince anyone, however, and attempts to enlist the Latvians in an invasion of Russia to coincide with the push by Yudenich and the Estonians on Petrograd fell on deaf ears. In early October, attempting to go through the Latvians instead, Bermont-Avalov pushed his forces ahead to the west bank of the Daugava.
In mid-October, however, the Latvians counterattacked, and by mid-November had reached Jelgava. Freikorps reinforcements from East Prussia, arriving despite attempts by the German government to stop them, prevented a complete encirclement at Jelgava. Bermont-Avalov resigned and hoped to hand over control of his forces back to the German Army. The Germans attempted to negotiate another ceasefire but were rebuffed; on November 26, the Latvians declared that they were at war with Germany. On November 30, the last Germans were pushed across the border into Lithuania. The Latvians wanted to pursue, especially once they saw the damage inflicted by the Germans during their retreat, but were dissuaded by the French. The French also negotiated a ceasefire between Lithuania and the Germans, who crossed back over the border into East Prussia before long. Germany’s postwar adventures in the Baltic were over, at least until 1939.
Sources include: Prit Buttar, The Splintered Empires