Most of the Prussian estates, with the exception of the Bishopric of Warmia, pledge allegiance to their new ruler after April 15.

Poland sends the Grand Master a declaration of war, predated to February 22.

Both sides expect the war to end quickly.

Poland is in conflict with the Grand Duchy of Lithuania in 1454: although Casimir IV is Grand Duke of Lithuania as well as King of Poland, Lithuania will send no aid during the war to Poland, and aside from a few ineffective raids, will not participate during the conflict.

There is also the threat of attack by the Grand Duchy of Moscow and by the Ottoman Empire, which had sacked Constantinople in 1453.

Elsewhere, the international situation is quite good for Poland, as no outside states are likely to intervene.

The southern border of Poland is more or less secure because of the weakness of the Bohemia resulting from the Hussite Wars.

Bohemia’s internal problems render it unable to directly intervene in the conflict.

The Hanseatic League sympathizes with the Prussian cities but backs the Teutonic Knights because the order grants them additional privileges.

The Livonian Order, embroiled in problems with Denmark, is unable to help the Teutonic Knights in Prussia.

Because of the conflict between Sweden and Denmark, both sides will stay more or less neutral in the coming conflict.

France and England are too weakened after the Hundred Years' War; England is soon to be embroiled in a civil war, the Wars of the Roses.

The Duke of Burgundy, Flanders, and the Netherlands, Philip the Good, is more interested in creating an independent Kingdom of Burgundy.

Pope Nicholas V's primary concern is dealing with the Ottoman Turks.