Why was Charles Schenck arrested during World War 1?

Charles Schenck was arrested during World War I for violating the Espionage Act of 1917. He was a socialist who distributed leaflets urging resistance to the military draft, arguing that it violated the Thirteenth Amendment's prohibition against involuntary servitude. His actions were deemed a threat to the draft and national security, leading to his conviction in 1919. The Supreme Court upheld his conviction in Schenck v. United States, ruling that free speech could be limited during wartime if it posed a "clear and present danger."