Which of the following people worked for independence in southern South America including countries like Argentina and Chile?

José de San Martín

Explanation:

José de San Martín was responsible for declaring Peruvian independence. He was a famous revolutionary leader and helped independence movements in southern South America.

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.

newly independent countries of the former ussr