A "Sergeant Marshall" is a member of the Armed Forces, more specifically the the New Zealand Army and is a man of giant stature who is capable of ripping the heads of his enemies and crushing there skulls with his own hands. Often feared by his foe and subordinates, equally and superiors who will often given to insure there own head remains on firmly attached to there Shoulders.
Enemy fighter 1: "who's that man standing shirtless with a taiaha in one hand and a human skull in the other"
Enemy Fighter 2: "That's a Sergeant Marshall a man capable of absolute destruction"
Enemy Fighter 1: "We Should Run"
Enemy Fighter 2: "Its too late once a Sergeant Marshall spots you all hope is lost and you are sure to have you're skull crushed"
Sergeant Marshall: "Aaarrggghhh!!!!"