Explain the two events that turned the United States against the Central Powers. Why did the United States declare war on Germany?

I can tell you why the U.S. declared war on Germany. Germany sank many American merchant ships. Also, the Zimmerman telegram caused anti-German feelings to rise.

Explanation:

Germany sank many American merchant ships that were around the British Isles. Also, Germany sank the Lusitania, which killed 1,200 people (including 128 Americans), so President Wilson threatened to break off all diplomatic relations if Germany didn't stop sinking passenger ships, which caused tensions to rise. Finally, the Zimmerman telegram was a telegram that Arthur Zimmerman (Germany's foreign secretary) sent a note to the German minister that was in Mexico, telling him to urge Mexico to attack the U.S. if the U.S. declared war on Germany.

cuban communists pressured the soviet union to place missiles in cuba.