 The war effort, debilitated by a rebellious confederation established by the unpaid military, was continued. Turkey, threatened by the Polish territorial gains became involved at the frontiers, and a peace between Russia and Sweden was agreed to in 1617. Fearing the new alliance the Commonwealth undertook one more major expedition, which took over Vyazma and arrived at the walls of Moscow, in an attempt to impose the rule of Władysław Vasa again. The city would not open its gates and not enough military strength was brought in to attempt a forced take-over.
