1920 – The second Palmer Raid takes place with another 6,000 suspected communists and anarchists arrested and held without trial. These raids take place in several U.S. cities.

"The Palmer Raids were a series of raids conducted during the First Red Scare by the United States Department of Justice under the administration of President Woodrow Wilson to capture and arrest suspected radical leftists, mostly Italian and Eastern European immigrants and especially anarchists and communists, and deport them from the United States. The raids particularly targeted Italian immigrants and Eastern European Jewish immigrants with suspected radical leftist ties, with particular focus on Italian anarchists and immigrant leftist labor activists."