Final answer:
Jose de San Martin led the Army of the Andes over the Andes Mountains.
Step-by-step explanation:
The general who led the Army of the Andes over the Andes Mountains was Jose de San Martin. In 1817, San Martin led his army of five thousand soldiers through the Andean mountains, crossing over six different passes into Chile. Under his command, the Argentine forces achieved great successes and eventually achieved independence for Argentina, Chile, and Peru.