Mariano Acha (11 November 1799 - 16 September 1841) was a soldier who fought in the Argentine Civil Wars.
On 20 March 1841 the four hundred men led by Colonel Mariano Acha were surprised by troops under General Nazario Benavídez and scattered.
[1] In the Battle of Angaco on 16 August 1841, Acha defeated Benavides.
[3] Although he had surrendered on condition that his life would be spared, he was shot dead by a firing squad.
Acha's body was decapitated and his head displayed for public view.