Finucane wrote That's because the surprise was complete, as it was when the Marines overran the 7th MPs on the coast and brushed aside the blocking force sent out to meet them on the road to Whatsisville.  But  after arriving there, there was fighting enough for everyone.  And once the Coalition's force was beaten, the door to victory had been swung open and Davis's army was chased into the mountains.

But wasn't the 7th MP were bascially undisciplined and they were totally lax. From what I read they basically get drunk and play drinking games.