A stronger Falklands garrison as deterrence

Would Argentina have attacked the Falklands if Britain maintained a stronger presence there?

Probably not if Britain had retained a battalion-sized garrison backed by aircraft and artillery, because the invasion would require far more force and carry much greater risk.

Argentina acted after the British presence appeared to be declining. A battalion, a fighter squadron, and artillery would make the islands much harder to seize quickly. That garrison could persuade the junta that invasion was too costly or too uncertain. Political and territorial alternatives, including pressure involving Chile, might then look more attractive.