President Cristina Fernandez de Kirchner has finally declassified a scathing review of the mistakes made by Argentina's military junta in going to war with Britain in 1982 trying to recover the Falkland Islands.
The Rattenbach Report is so critical of Argentina's military leadership that the last dictator ordered it kept secret for 50 years.
By making it public, Ms Kirchner said she hopes to show Argentina "will always be on the side of peace".
The release comes at a time of heightened tensions between Argentina and Britain over the sovereignty of the Falklands, which Argentina says Britain has illegally occupied since 1833.
Fernandez had sought to place the blame for the failed war on the 1976-1983 dictatorship and not the Argentinian people.
A version of the report was leaked years ago, revealing the junta had planned for an easy occupation and had been expecting backing from the USA, AP said.
Things didn't go to plan and the report confirms Argentine soldiers were sent into wintry conditions without proper clothing, supplies or weapons. Nor had they had basic training in weaponry and combat.
"Military commanders encouraged the preconceived notion that there would be no armed conflict, and that the situation would be resolved diplomatically, which affected the morale of the forces and their readiness for combat."
Prince William this week returned from a seven-week deployment to the Falkland Islands. William, a Flight Lieutenant with the RAF, was sent to the South Atlantic to fly search and rescue helicopter missions.