The Battle of Yamrizha was nothing short of a disaster for the Duchy. It was the pivotal event that determined the direction of the war, but the battle itself had not resulted in a definitive victory.
The Duchy undoubtedly lost the key logistics center of Yamrizha, with over 70% of the supplies, equipment, and weaponry stored at the site lost. The crucial railway dispatch concertation point and airport facilities were also lost. As a result, the Duchy had lost any possibility of breaking through the Mannheim Defense Line before the harsh winter set in. Conversely, Lapland also lacked the power to launch a counterattack and drive the Duchy Army completely back to the border.
The gradually decreasing temperature was one reason; more directly, both sides' finances were unable to continue supporting the war.
