Answer: Because they would have less manpower
Explanation:
Nationalism led to the assassination of the Archduke of Austria Franz Ferdinand. he was assassinated by Gavrilo Princip, a Serbian Nationalist.
I believe it is 71 B.C correct me if im wrong
Alfred Thayer Mahan was the one who took the position that the United States should establish naval bases outside of the country. Alfred was named "the most important American strategist of the nineteenth century", and was known for being a naval officer for most of his life.