He found a secret conversation between Roosevelt and Churchill which stated Roosevelt wanted to go to war which was different then what Roosevelt told the American people. Tyler tried to alert the American people, but was caught leaving the embassy with all the proof he had to convince. He was later put on trial at a British court which found him guilty of treason ;Tyler was sentenced to jail until the end of the World War II.
Before World War II the U.S put sanctions on Japan banning all of their imports into America this heavily effecting the Japanese economy and completely diminishing the relationship with Japan. When Panama Canal was closed to Japan it completely stopped any shipments through that part of the ocean, since its was a very vital place for the ships to pass through decreasing the time it takes to cross the Pacific ocean to the Atlantic Ocean. The U.S also did this last year to Russia over the Ukraine conflict which really has nothing to do with Ukraine just a lot of anger and