The Polish hetman (historical army rank equivalent to field marshal) Stanisław Koniecpolski quickly came to his king's aid with a force of 4,200 light cavalry, 1,000 dragoons, and 1,000 infantry. In early November the king handed him command of the army. With further reinforcements Koniecpolski soon had 10,000 men to match the 20,000 Swedish troops in Prussia. Engaging in a war of maneuver - small mobile units striking at the enemy's lines of communication - Hetman Koniecpolski managed to halt any further Swedish advances, even forcing the Swedes onto the defensive.