Was the United States involved in the World War 1 when it first started?

No, but they enter

after 2 years and 9 to 10 months

Explanation:

The World war 1 started July 28 1914 while The American entry into World War I came on April 6, 1917, after a year long effort.

Now, up until just before the U. S. declared war on April 6th, 1917, the U. S. had desperately tried to stay neutral, but ties to Britain, propaganda, the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U. S. pushed the U. S. to getting involved.