Unit 13 By Nick roman Apr 3, 1903 Wright brothers fly first airplane Jan 1, 1915 Council of National Defense Established Apr 3, 1917 Germany resumes unrestricted submarine warfare Also in this year, the Bolshevik Revolution happened and the U.S. joins the fight in WW1. Apr 3, 1919 Red Scare Starts Ends in 1920 Apr 3, 1919 American Legion founded Apr 3, 1920 Radio Broadcasting begins Apr 3, 1924 Immigration Act of 1924 Apr 3, 1924 Adjusted Compensation Act for veterans