Units are often unwilling to march when the enemy is close. If you wish a unit to begin a march move whilst within 8" of an enemy unit (ignoring enemy units that are fleeing), it must first make a Leadership test. If this test is failed, the unit refuses to march but may move normally. If this test is passed, the unit may march.

Note that if a unit attempts an Enemy Sighted test in order to march and fails, it is considered to have marched, even if its controlling player then elects to not move the unit at all.