No we were in a conflict. The UK specifically didn't declare war, and the Belgrano was sunk outside the exclusion zone, on executive order of the prime minister - It was of course the right decision.

But she did celebrate the victory, which is the celebration of others deaths, most of whom were young kids conscripted by a facist regime that murdered and tortured its own people. Those kids, what choice did they have. It might have had to be done, it might even have been of benefit to argentina (as the Junta collapsed soon after).

Nothing really to celebrate there. 649 Argentinans died along with 3 Falkland Islanders and 255 British Service men. Ironically more service men from the Falklands would die by their own hand in the coming decade after the war, than were killed by enemy fire - largely down to the Conservative parties dismantling of the British Mental Health system.

Well said Jamiemartin
I have to say, it astounds me the level of ignorance that I have been reading about this.
As Jamiemartin said we were not actually at war with Argentina over the Falklands, neither country declared war as this brings with it a number of international obligations, Thatcher merely said that she was sending a task force south to reclaim the islands 'by force if necessary.' However this, as she knew full well, also obliged her to adhere to certain rules i.e. international law, maritime law and the Geneva convention - all updated after WW2 to protect conflicts from spreading, to protect civilians and prisoners - believe me we should all believe that governments adhere by these rules. One of those updated requirements was to set up a 'sphere of conflict' which in the case of the Falklands was a 200 mile exclusion zone. (in Iraq it was a no fly zone around certain defined parallels).
The Belgrano was sunk 36 miles outside the exclusion zone by a nuclear submarine on direct orders from the UK Government, although its precise co-ordinates had been disclosed
This was reported to MPs 3 years later by Clive Ponting who was subsequently charged with a breach of the Official secrets act.
That the sinking took place 14 hours after a peace deal was announced by Peru (although Thatcher said she didn't receive it hmmmm...) is largely irrelevant as it was a breach of international law and the conventions of warfare in itself.
Technically she cant be charged with a war crime because Britain were not technically at war but she can be charged with an atrocity. The likelihood of this is however negligible given that the UK has a permanent veto on the security council that governs the UN tribunal.
For the record I was in favour of the Falklands being reclaimed (and indeed the Iraq war with certain amendments) but I cannot agree with a war crime or deliberate atrocity - and I am baffled that there are some whipped up war mongers on here who probably saw the headline 'GOTCHA' who seem to be claiming they are more patriotic because they do.
The likes of Milosevic have also used 'well we were at war with them' as their defence and they too were rightfully found guilty of war crimes and atrocities.