The truce was to last from October 8, 1409 until sunset on June 24, 1410.
Because it was obvious that this state of affairs could not last for ever, the king of Poland said: "Next year we either conquer the Crossed Knights or we perish as a nation, and as individuals."
During the truce Jagiello sent spies to the Order lands to learn all they could about military strength of the enemy.
Jagiello also sent his emissaries to Kiev, seeking help from the Tartars, who agreed to send 1500 cavalrymen after May 1410. The Bohemians would send 3000 men, help would also come from Moldova and Russia, since they understood the importance of this battle.
In December 1409, Jagiello, Vytautas, and Dzala-ed-din, the leader of Tartars, met in Brzesc Litewski, and formulated a plan to crush the Teutonic Order once and for all.
