Conflict post is incorrect, this is a Argentinian-Brazilian Conquest of Falklands
This isn't the civil war, that is an other thing.
Aircraft Carrier Strike Group A along with 3 destroyers and the two ASS and one ATD approach Buenos Aires (which is in good guy territory) where they drop off half of the ground forces (excluding marines) stationed in the area. Of course, most of the people come in by plane, but yeah.