Which famous abolitonist met with president Lincoln to discuss full equality for negro troops in union armies?

Frederick Douglass, the renowned abolitionist and former enslaved person, met with President Abraham Lincoln to advocate for full equality for Black troops in the Union Army. Douglass emphasized the importance of recognizing the contributions and rights of Black soldiers, arguing that they deserved equal pay and treatment. His meetings with Lincoln were pivotal in raising awareness about the capabilities and rights of African Americans during the Civil War.