Flag of the Andes

The flag of the Andes was a flag used by Argentine patriot José de San Martín and his Army of the Andes during their Crossing of the Andes and their subsequent military campaigns to Chile and Peru. The flag of the Andes was personally designed by San Martín and sewn by ladies from the Cuyo region and wives of San Martín's officers. It includes a proto-coat of arms of Argentina placed horizontally over a sky-blue and white bicolor background.

Source: Wikipedia