How did the U. S. support the Allies prior to entering WWI?

The United States had 4,355,000 military personnel involved in World War I. ... The U.S. Navy played a major role in helping to blockade Germany, keeping out supplies and hurting Germany economically. The U.S. forces that were sent to Europe during World War I were called the American Expeditionary Forces (AEF).

an interest group is an organization whose members share common concerns, and try to influence government policies that impact those concerns. elected officials frequently complain about the influence of "special interests" on american politics.