1. It never lead to a single large conflict. Rather many smaller ones.
2. During the Cold War, the USA and USSR both funded army’s of smaller countries to fight for them. For instance the Korean and Veitnam Wars.
3. The Cold War came to a close when the Soviet Union dissolved in 1991.
Ask this question again, you're going to need a more specific time the president has done this. however, if you are asking about WWI, the USS Lusitania, the Zimmerman Telegram, German U Boats targeting American ships, and so on.
I am not really sure i would find a African settlers journal
The most accomplished Confederate General (South) was General Robert E. Lee, commander of the Army of Northern Virginia.
General Ulysses S. Grant led the Union Army during the later years of the war and later ran for office, becoming the President of The United States.