From the rules: There are 50 pieces or "men" constituting the Attacking Force use and Three "Officers" constituting the Garrison of the Fort.
Place the 50 pieces on the black spots outside the fort, the defender places the 3 officers on any of the dots on the front rampart of the fort.
The object of the attacking force is by solidly pressing forward to fill the 13 spaces of the fort.
The object of the garrison is to destroy the advancing force by jumping over and removing pieces so that the attacker cannot win the game.
Each player moves alternately. The defender can move on black and red lines in any direction. The defender can also jump over and remove any enemy on an adjacent spot if a vacant spot exists beyond. The attacker cannot jump and cannot move backward on the red lines.