The US Response would be organized like this:
The commander would be a four-star Coast Guard admiral.
He would have a four-star subordinate from the Army, the Navy, the Air Force, and the Marines.
He would have a three-star Chief of Staff from the Army, the Navy, the Air Force, the Marines, and the Coast Guard.
There would be a four-star Air Force general commanding the ground forces, US Army and US Marines.
There would be a four-star Army General commanding the naval forces, US Navy and US Coast Guard.
There would be a four-star Marine General commanding the air forces, US Air Force and US Marine Air.
There would be a Navy Vice Admiral commanding the special forces; a Special Forces Group of the US Army, a Marine Recon unit, a Naval Sea-Air-Land (SEALS) Team, and an Air Force Air Commando.
There would be the U.S. XVIII Airborne Corps, commanding the 82nd Airborne Division and support units, commanded by a Lieutenant-General, US Army.
There would be the US II Marine Expeditionary Force, commanding the 2nd Marine Division and associated air assets, commanded by a Lieutenant-General, US Marines.
There would be two Naval Task Forces, each built around a carrier, each commanded by a US Navy Vice Admiral.
There would be an Amphibious Task Force, containing Naval and Coast Guard Assets, commanded by a US Navy Vice Admiral with a US Coast Guard Vice Admiral as deputy.
Once Congress had voted for all the requisite promotions, and once the Department of Defense had chosen a catchy code name for the operation, and once the media had assembled their coverage, with every unit having an embedded media team, the operation would begin.
By then, the Argentines would have resettled the former population, installed Argentine settlers, and granted the US medial free access to the probable landing sites with round-the-clock data uplinks for full coverage.