What reason did w. e.b Dubois give for supporting the war

Du Bois, sociologist, historian, and socialist, promoted African American advancement and expected the war to improve the position of nonwhite minorities in the United States and globally.

W.E.B. Du Bois, sociologist, historian, and socialist, promoted African American advancement and expected the war to improve the position of nonwhite minorities in the United States and globally. He was the editor of the NAACP magazine, which protested against racial discrimination in the U.S. Armed Forces, and was a key organizer of the 1919 Pan-African Congress.

i know number 8 is something about only using 3/5 of the slave votes.