The espionage Act of 1917 prohibited spying, interfering with the draft, and false statements that might impede military success.
Foner touched on some points of the espionage act. He mentions the Espionage act of 1917, the Sedition Act of 1918, and the Eugene V. Debs case of 1918, which landed Debs in jail because of an anti war speech. I believe he should have touched on some of the penalties for violating the act such as a $100,000 fine or up to 20 years in prison if convicted.
Questions Left wondering about
1) Did any major political figure every oppose the act by saying it was unconstitutional?
2) How many people were actually convicted under the act during WWI?