- The Red Scare
- Grew out of fear of a communist revolution in the USA
- Following the Bolshevik revolution, there were communist uprisings in Germany and Hungary
- "New" immigrants were seen as potential spies
- 1918 Sedition Act
- Attempt to clamp down on expression of anti govt. ideas
- 1918 Alien Act
- Gave govt. the power to deport anyone who had been "A member of any anarchist organisation."