Lanusse evaluated that the solution to the multiple conflicts was to end the proscription of Peronism and to decree a political opening that allowed a transition towards democracy.

[citation needed] A graduate of the Army Academy (Colegio Militar de la Nación, class of 1938), he served in different Cavalry units before becoming commander of the Regimiento de Granaderos a Caballo (Regiment of Horse Grenadiers, presidential escort unit).

During his administration he established diplomatic relations with China and continuously faced political unrest, with an increase in guerrilla activity.

On 22 August 1971, several imprisoned guerrillas attempted to escape from the Naval Base of Rawson in Patagonia, and were executed without trial in the Trelew massacre.

[2][3] In 1985, Lanusse published his autobiography and criticized the human rights violations that took place during the Dirty War, including the state murder of his cousin, diplomat Elena Holmberg.