The Force:
USS Wasp

An Amphibious Assault Ship, with a large LHD (Landing Helicopter Deck). The ship can embark, transport, deploy, command and fully support all elements of a Marine Expeditionary Unit (MEU) of 2,000 Marines, inserting forces ashore via helicopters, landing craft and amphibious vehicles. The WASP Class is the first specifically designed to employ air-cushion landing craft (LCACS), and to carry a squadron of Harrier II (AV-8B) STOVL (Short Take Off Vertical Landing) jets.
USS Iowa

Nine 16" guns in three triple turrets, six 5" guns. Nuff said.
Plus also a support infrastructure built into a number of modified ships, to supply the needs of the ships, men, aircraft, vehicles, plus any holdings they may begin to set up:
- A large oil drillship
- A large vessel completely given over to a large onboard oil refinery.
- Several ULCC tankers which each have about a billion gallons capacity, the ships carry different grades of fuel, and between them have enough to keep operations going for years (to tide them over essentially until they can be extracting their own fuel)
- Several large bulk carriers, all at least over 80,000 tons and carrying thousands of tons of any commonly needed replacement part, thousands of tons of ammo for everything up to and including the Iowa's guns.
- A large ship outfitted as one massive machine shop.
- A massive ship which is a floating steel refinery - has everything required to take in raw iron ore and output high-grade steel
- A factory ship with facilities to produce some other vital substances, such as weapon propellant, explosives, etc, again from raw materials.
- A ship full of construction equipment, eg cranes, diggers, bulldozers, cement mixers, angle grinders, chainsaws, jackhammers, hammers, saws, nails, etc. etc. etc.