U-boats were military submarines used by the Germans. While they were useful against warships, U-boats were the most effective in economic warfare by blockading coasts so resources could not be shipped to Germany's allies. WWI was the first major war that employed submarines in warfare.
Please mark brainliest if this helped :)
Well since you didn't put any words to describe him I would say that he was a Prussian born American military officer.
England, was the new world that provided them with economic supermacy