A. The Soviet Union became an ally of the United States and Great Britain during World War II.
Answer:
Since its in Japan's terrain they have an advantage on shipping routes and everything.
Explanation:
The correct answer is A) The Zimmerman Telegram.
The Zimmerman Telegram was supposed to be a secret message sent from the German government to the Mexican government. The goal of this message was to get Mexico to invade the United States in order to distract them from World War I in Europe. When this message was intercepted and the US govenrment knew what the German government was trying to do, they declared war on Germany.
It was necessary to win the war because the south wanted to separate and that would make the south and north both weak also the south wanted slave but the north didnt