The Malvinas War (called Falklands War by the British) started on April 2, 1982 between Argentina and the U.K. and led to the end of Argentinean dictatorship.

CSP-Conlutas Media Workgroup
April 24, 2019

Under pressure from economic recession and labor mass mobilizations, the dictator Leopoldo Galtieri decided to recover militarily the Malvinas Islands from British imperialism.
Galtieri expected a non-response by the British together with support from the U.S.
Neither of them happened. The British backlash was tremendous.
The British Prime-Minister Margaret Thatcher sent the largest military force since the end of World War 2.
On June 14, 1982 the British won the war. 649 Argentinian soldiers died together with 255 British plus 3 civilians.
Few days later, under strong popular pressure, Galtieri resigned.
All presidents that followed, from Raul Alfonsin to Mauricio Macri, have never been interested in challenging British interests.
The lessons about the war clearly demonstrate that only the working class and the poor people are really interested in liberating the islands.