This was known as the war guilt clause, part of article 231 of the Treaty of Versailles
General Norman Schwärzkopf was the general.
Assuming you're referring to Frederick Douglass, he was subject to slavery before escaping it. Therefore he could talk about his experiences as a slave
Them being for the sake of their economy, religion and glory. They wanted to improve their economy for instance by acquiring more spices, gold, and better and faster trading routes. Also, they really believed in the need to spread their religion, Christianity. Hope this is right lol