Why were the battles at gettysburg and vicksburg considered a turning point?

Which type of constitutional power allows congress to regulate immigration and naturalization?

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.

Who was the first present of the united states