At age eighteen (18) Between eighteen (18) and twenty-six (26)President Lincoln tried to draft men to fight during the Civil War, but many people became angry and rioted. In 1917, Congress passed the Selective Service Act. This act gave President Woodrow Wilson the power to temporarily increase the U.S. military during World War I. In 1940, President Franklin Roosevelt signed … Continue reading 57. When must all men register for the Selective Service?