Both Galtieri and Thatcher saw political opportunities in that situation, and both attempted to exploit the situtation to their own benefit. They gambled. Galtieri lost, Thatcher won. In any case, the greater blame attaches to Galtieri, because it was basically his idea to start the whole thing off...

The servicemen who died on both sides were, as usual, simply the unlucky victims of power politics between nations. On the other hand...they were doing their job, weren't they? Their job requires them to obey orders.

I think the Argentine government probably expected the British to accept a fait accompli once they had quickly occupied the islands. They may have even been foolish enough to imagine that Margaret Thatcher, because she was a woman, would not have the nerve to go to war to recover those islands. If so....LOL!...they would have to be ranked among the most foolish miscalculators in history. I can think of no one less likely to back down in such a crisis than Margaret Thatcher.