The Crossing of the Andes (Cruce de los Andes) in 1817 was one of the most important feats in the Argentine and Chilean wars of independence, in which a combined army of Argentine soldiers and Chilean exiles invaded Chile leading to Chile's liberation from Spanish rule.
(read more in wikipedia).
Argentina 2017, Cruce de los Andes.
The miniaturesheet shows part of "Paso de los Andes" by Franz Van Riel (1879-1951).
(Representation of the Crossing of the Andes)
Museo del Regimiento de Granaderos a Caballo, Buenos Aires (1.43x 2.08 metres)
The full painting you can see here link (wikipedia).
Peru 2018, Cruce de los Andes.
The stamp was issued in the series "Towards the 200th Anniversary of Independence".