War machines are built to be strong and durable rather than for speed and, as such, they are slow and cumbersome to move once erected. To represent this, war machines cannot march, declare a charge or make a pursuit move. Additionally, war machines suffer a -1 modifier to the result of any Flee roll they make (to a minimum of 1).
However, a war machine can pivot freely at any time during its turn (the better to face the enemy) and may make a follow up move as normal. Should a war machine pivot, it does not count as having moved.