Complex sentence: Hoar remained on Grant's cabinet until November 1870, when he was replaced by Amos T. Akerman of Georgia, an aggressive attorney who supported Congressional Reconstruction and protected African American civil rights.
Split into simpler sentences: Hoar remained on Grant's cabinet until November 1870, when his successor Amos T. Akerman was sworning. Akerman was from Georgia, an aggressive attorney who supported Congressional Reconstruction and protected African American civil rights.