Final answer:
The order of events is: unrestricted submarine warfare announced, Zimmerman Telegram released, US declared war on Germany, American troops deployed to Europe, and the armistice was signed.
Step-by-step explanation:
To place the following events in the order they occurred, we need to consider the historical context of World War I and the United States' entry into the conflict. Here is the sequence:
- Germany announced a new policy of unrestricted submarine warfare on February 1, 1917.
- The Zimmerman Telegram was released to the public on March 1, 1917.
- The US declared war on Germany on April 6, 1917.
- American troops deployed to Europe starting June 26, 1917.
- The armistice was signed on November 11, 1918, ending the hostilities.