Army - The Army would secure a dungeon by locking all doors, put bars on the windows, and establish one entrance with a guard post and armed guards and carefully check the IDs of all personnel who try to enter.
Navy - The Navy would secure a dungeon by swabbing all decks, turn off all coffee pots, turn off all lights, lock all office doors, and lock all entrances as they leave the dungeon.
Marines - The Marines would secure a dungeon by assaulting it with a
combined arms team, breaking into all interior rooms, shooting all
resistance, and planting demolition charges as they evacuate in an
orderly manner. They would then level the dungeon to prevent further
enemy use.
Air Force - The Air Force would secure a dungeon by having the Base
Contracting Officer negotiate a three-year lease with a option to purchase.