A Dwarf army contains many skilled workers that can be put to good use by a Master Engineer. Up to one war machine (not a Gyrocopter!) may be entrenched per Master Engineer in the army. An entrenched war machine is treated as being in hard cover when shot at, and as protected by a defended obstacle if attacked in close combat. An entrenched war machine can be pivoted to fire but if it moves in any other way, the entrenchment is lost. If the war machine is destroyed, the entrenchment is lost at the same time.