Which people were targeted by the "Palmer Raids" of 1919-1920?

The Palmers Raids were a series of government actions against suspected radicals, anarchists, and communists commenced in 1919 by Attorney General A. Mitchell Palmer.

The Palmer Raids were a series of raids conducted in November 1919 and January 1920 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