He enlisted many of his slaves for service in the Union Army .
Dumas was Captain of Company B of the 1st Regiment and received a promotion to major in the 2nd Louisiana Native Guards , one the highest ranks achieved by an African American during the war .
Dumas enlisted many of Dumas ' slaves for service in the Union Army .
Dumas was Captain of Company B of the 1st Regiment and received a promotion to major in the 2nd Louisiana Native Guards , one the highest ranks achieved by an African American during the war .