On September 3, 1939, in response to Hitler’s invasion of Poland,
Britain and France, both allies of the overrun nation declare war
on Germany.

The first casualty of that declaration was not German—but the
British ocean liner Athenia, which was sunk by a German U-30
submarine that had assumed the liner was armed and belligerent.

There were more than 1,100 passengers on board, 112 of whom
lost their lives. Of those, 28 were Americans, but President
Roosevelt was unfazed by the tragedy, declaring that no one
was to “thoughtlessly or falsely talk of America sending its
armies to European fields.” The United States would remain
neutral.

Franklin Delano Roosevelt
(January 30, 1882 – April 12, 1945)

British ocean liner SS Athenia was sunk when a torpedo
from the German submarine U-30 sank her in the Western Approaches.