Frohwerk v. United States 249 U.S. 204 (1919)
[defendants’ attempts to cause disloyalty and mutiny in the military through the publication of newspaper articles in violation of the Espionage Act were not protected […]
Schenck v. United States 249 U.S. 47 (1919)
[Rejecting anti-draft advocates’ First Amendment defense against violation of Espionage Act because speech was sufficiently likely to hinder war effort]
Schenck v. United States, 249 U.S. 47 (1919)
[a landmark decision concerning enforcement of the Espionage Act of 1917; The Supreme Court concluded the defendants who distributed flyers to draft-age men urging resistance […]
Williams v. Bruffy, 96 U.S. 176 (1877)
[Finding the Confederate States of America unconstitutional under the Treaty Clause]
Texas v. White, 74 U.S. (7 Wall.) 700 (1869)
[ruling unilateral secession unconstitutional; secession could occur “through revolution, or through consent of the States”]
Ex Parte Bollman and Ex Parte Swartwout 8 U.S. 75 (1807)
(The Supreme Court held that the constitutional definition of treason excluded mere conspiracy to levy war against the U.S.)