April 6, 2012 -
US enters the
Great War (for the first time)
On this day in
1917, the
United States formally declared war against
Germany and entered
World War I. At the time, the war had been going on in Europe for three years, but there was no real immediate threat to the
United States. Up until then,
Woodrow Wilson had been opposed to the war. His campaign for president in
1916 included the slogan, "
He kept us out of the war," though Wilson never used that phrase himself.
But two things changed Wilson's mind. The first was that
Germany had declared unrestricted warfare on American merchant vessels, and began torpedoing any ship they thought was carrying munitions to the British and the French. At that point, the
United States was the biggest supplier of munitions to the British and the French. And the second was that the
United States intercepted a telegram from
Germany to
Mexico, asking for an alliance against the
United States. If
Mexico was willing to attack the U.S., the Germans said they would help
Mexico regain
Texas, New Mexico and
Arizona.
The war was extraordinarily expensive for the
United States, costing about $
1 million per hour in the last
25 months of the war. The amount of money the U.S. government spent on
World War I was more than the combined total of what it had spent in the previous
100 years.
Woodrow Wilson hoped it would be the war to end all wars, but instead it was just the beginning of the
United States' policy of military intervention in world affairs.