The main reason why the Boers and the British fought over Southern Africa was because large deposits of gold had been found in the region, and the Boers did not want the British to rule over the area and claim the riches.
The Confiscation Acts themselves did not do much but laid the legal and social groundwork for the Emancipation Proclamation which would come in the following year.
Lincoln was able to capitalize on the reaction to the Confiscation Act to feel comfortable enough to push forward the Emancipation Proclamation, which applied to all slaves in rebel held territory.
B. Himalayas. quizlet has this question if i'm not mistaken.