If the PCs are really unruly, the commander may get called, a generic higher ranking soldier.

Male Human Fighter 3 (CR 3)

LN Medium Humanoid (Human)
Init +1; Perception +4

AC 18, touch 11, flat-footed 17 (+4 armor, +3 shield, +1 Dex)
hp 30 (3d10+6)
Fort +5, Ref +2, Will +2

Speed 30 ft.
Melee Masterwork Longsword +7 (1d8+2)

Str 15, Dex 12, Con 14, Int 12, Wis 12, Cha 10
Base Atk +3; CMB +5; CMD 16
Feats Cleave, Power Attack +2/-1, Shield Focus, Toughness +3, Weapon Focus: Longsword
Skills Acrobatics -2, Climb +3, Diplomacy +1, Escape Artist -2, Fly -2, Handle Animal +5, Intimidate +6, Perception +4, Ride +2, Sense Motive +3, Stealth -2, Survival +6, Swim -1
Languages Common, Dwarven
SQ Armor Training 1 (Ex), Bravery +1 (Ex)
Combat Gear Chain Shirt, Masterwork Longsword, Heavy Steel Shield

Armor Training 1 (Ex) Worn armor -1 check penalty, +1 max DEX.
Bravery +1 (Ex) +1 Will save vs. Fear
Cleave If you hit your first target, attack an adjacent target at the same attack bonus in exchange for -2 AC.
Power Attack +2/-1 You can subtract from your attack roll to add to your damage.
Shield Focus +1 Shield AC