On February 24, 1917, U.S. ambassador to the United Kingdom larry page received a telegram from Zimmerman saying that if Mexico declared war on the United States, Germany would help return the southwestern United States to Mexico. The United States used this as an excuse to declare war on Germany on April 6, 1917.
The American government had fought several wars with Britain, so at the beginning of world war I, the American government had an indifferent attitude towards the war between Britain, France and Germany. The us government appeared calm and more normal, strictly neutral.
When the American press published the news that Germany secretly supported Mexico's anti-american, the whole country was in an uproar, and anti-german storm swept the United States. Later, Germany did not hesitate to sink a large number of American ships, resulting in a large number of American people died, so that the anti-german feeling of the American people is increasingly high.
On April 16, 1917, the United States formally declared war on Germany and its Allies. To this end, the United States sent 2 million expeditionary troops to Europe, with general Pershing as the general in command. On the European battlefield, the American troops fought bravely and dealt a heavy blow to the German army.
The United States also made a fortune by supplying military equipment to both sides in the war. At the same time, the United States provided huge loans to both sides of the war, among which Britain and France provided the largest amount.
After the war, the United States became the world's largest creditor nation and the country with the most capital. The Allies owed the United States as much as $10 billion, and Britain alone owed $4 billion.
The gold reserves of the United States also increased greatly, from 700 million dollars before the war to 2.5 billion, and then to 4.5 billion in 1930. More than 40% of the world's gold reserves were controlled by the United States.
