In the early stages of the Thirteen Years' War, the Battle of Chojnice marked a pivotal confrontation between the Polish-Lithuanian Commonwealth and the Teutonic Order. This conflict erupted largely from disputes over control of Pomerania, a strategically important region along the Baltic Sea. The Polish sought to reclaim territories lost to the Teutonic Knights during prior conflicts, and tensions escalated quickly, leading to armed hostilities. The battle unfolded near the town of Chojnice, located in present-day Poland. The Polish army was led by commanders keen to solidify their position in the face of Teutonic aggression, but they were met with well-coordinated tactics and a larger force from the Knights.

During the engagement, the Teutonic Knights employed disciplined formations and superior cavalry maneuvers, which effectively overwhelmed the Polish troops. Despite valiant efforts from the Polish, the battle concluded with a decisive victory for the Teutonic Order. This defeat was not just a military setback; it had wider implications for the Polish strategy in the ongoing war and their aspirations towards regional dominance. It also served to galvanize both sides as they prepared for subsequent encounters over the contentious Pomeranian territories.

The aftermath of the battle saw the Polish forces regrouping and reassessing their strategies while the Knights sought to consolidate their territorial gains. The engagement ultimately underscored the complexities of feudal alliances and the military prowess of the Teutonic Order, impacting the course of the Thirteen Years' War as both sides continued to mobilize for further confrontations.