In many ways, gates are the weakest part of any fortification. Although they are normally made of iron, wood or steel and guarded by massive bastions, it is still much easier to break through a gate then it is to batter down the walls of a fortress. To combat this, most gates are flanked by two towers and guarded by the best troops available to the fortress commander.

At least two models are needed to open or close the fortress gates from the inside. This can be done in their Movement phase, and the models opening or closing the gate suffer no penalties for their movement. Gates cannot be opened from the outside. Your force must break in!