When the US entered world war one, did it include declaration of war against the Ottoman Empire? Were there any actions or plans for US military operations in the Middle East?
No. During World War I, the United States first waged war only against Germany. It was not even officially an "Ally," although it cooperated with the Allies. America had tried hard to remain neutral during the war, and turned against Germany only because of the Zimmerman Telegram. That's because this message purported to encourage Mexico to tie down America by "invading" Texas, even though such an "invasion" was really an attempt by Mexico's Pancho Villa to flee his enemies in the so-called Mexican Revolution. America had no quarrel with the Ottoman Empire, although it did later declare war against Austria-Hungary.
Although war was declared against Germany on April 6, 1917, American troops began arriving in France in large numbers about a year later, thereby deciding a close issue. The arrival of American soldiers gave the Allies of supply of fresh troops, at a time when everyone else's was worn out by four years of war, giving the Allies a decisive advantage.