The Battle for Wloclawek was a major battle of the Prussian Civil War. On the morning of May 9, 2011, a large Prussian National Army infantry force quickly surrounded the city and over three days pushed Polish and Slovak forces into the city. The 76,000 Prussian soldiers were able to quickly break the rebels' front lines, but found that breaking the remaining forces became very difficult. However, the highly trained Prussian forces were able to put down the resisters with favorable casualties. Thus, the battle drug out over the course of only three days as rebel forces were able to use the urban terrain to their advantage.