
Flag of the Army of the Andes.
The 'Army of the Andes' (
Spanish: ''Ejército de los Andes'') was the military force mustered by
José de San Martín in his campaign to free
Chile from the
Spanish Empire. In
1818 it crossed the
Andes Mountains from its staging point in
Cuyo in the
Argentine province of
Mendoza, succeeding in its objective by dislodging the Spanish from the country.
When it set out for Chile, the Army was composed of some 4000 soldiers, with 1200 auxileries to help in provisioning and supply. In addition, it had a complement of artillery.
For the crossing of the mountains, the Army was divided into two main columns, the first, commanded by
Bernardo O'Higgins, taking the
Los Patos Pass and the second, commanded by
Juan Gregorio de las Heras, taking the
Uspallata Pass. Because this second pass was more negotiable, the artillery was taken in the second column.

Uspallata Pass, through which the second column of the Army of the Andes passed.
These two divisions were the main body of the Army, but there were smaller detachments sent to the north and south as flanking wings. The smaller division to the north was composed of some 130 infantry as well as a group of Chilean expatriots, and was under the command of
Juan Manuel Cabot. To the south was a group under the command of the Chilean
Ramón Freire Serrano.
See also
★
Crossing of the Andes
★
Chilean Independence