The Thirteen Years' War, also called the War of the Cities, fought from 1454-1466, starts as an uprising by Prussian cities and the local nobility with the goal of gaining independence from the Teutonic Knights.

The Prussian Confederation asks the Polish king for help and offers to incorporate Prussia into the Kingdom of Poland.

When the king agrees, war between Poland and the Teutonic Knights breaks out.

It ends with the Second Peace of Thorn (1466) in favor of the confederacy and Poland, and will be followed by the War of the Priests from 1467-1479.