Already at war with Germany, the United States officially declared war on Austria-Hungary; the US never declared war on the other two Central Powers, the Ottoman Empire and Bulgaria.
President Wilson delivered his “Fourteen Points” speech, outlining a plan for peace after World War I. The Fourteen Points program called for the reduction of arms, self-determination of nations, and a league of nations.
The influenza (or Spanish influenza) epidemic of 1918 and 1919 killed as many as 50 million people worldwide. A quarter of all Americans were infected at some point, including President Woodrow Wilson, and approximately 675,000 people died of influenza in the United States.
The Treaty of Versailles was signed, ending World War I, imposing harsh surrender terms on Germany, creating territorial mandates, and arranging the creation of the League of Nations.
Democratic Party nominee Woodrow Wilson won the presidential election, beating out three other candidates: Republican incumbent William Howard Taft, Progressive Party nominee Theodore Roosevelt, and Socialist Party nominee Eugene V. Debs.