Meanwhile, another rebel group opens various gates to let the main body of citizens into the cannon factory. Several hundred citizens storm the factory with primitive weapons, but they are halted by cannon-fire from Boru. After a brief standoff, the riot resumes after Boru leaves for the palace and a group of prisoners led by Sho Tan make a surprise attack using gunpowder barrels. The remaining guards made a desperate attempt at escape, but were stopped when the resistance group managed to use a cannon against them. The soldiers in the factory surrenders and the rebels free all the slaves.