He was one of the main commanders during the Lima campaign and was known for his leadership during the Battle of La Rinconada de Ate.

[4] He began by sending several reconnaissance forces at Pampa Grande as well as in Portachuelo de Manchay which was in the north.

[4] He also requested Commander Pedro J. Roca y Boloña for resources to construct a defensive line which were allocated.

[4] Despite the increasingly difficult situation he found himself in, Vargas would continue to lead in the Battle of La Rinconada de Ate.

[5] After the war, Vargas would continue to serve in the Peruvian Army and was made a member of the Council of General Officers.