A couple of weeks before the Battle of New Orleans, the U.S. and British governments had negotiated and signed a peace treaty that put an effective end to the war between the two countries. Given that news from Europe took about a month to reach the U.S., both the U.S. soldiers led by General Andrew Jackson and the Red Coats led by General Sir Edward Pakenham was a pointless confrontation. A few weeks after the resounding U.S. victory (only 13 men were killed on the U.S. side and 285 on the British side), Jackson and his men got news of the peace treaty signed before their feat of arms.
Your answer would be A. The war ended with the Little boy and the Big boy being dropped. The little boy hitting hiroshima and causing more damage.
Assuming you're referring to the Civil War, African Americans received the best treatment in the North, since the North was fighting the war specifically to end the institution of slavery.
Answer: trenches. WW1 is famous for its trench warfare- a dangerous form of warfare that resulted in a lot of deaths as stalemates lasted for months.