The story of that delirious outburst in the United States against resident aliens which closely followed the World War and was generally known as "the Red Crusade," is a careful condensation, by the author, of an unpublished manuscript of his in which the events, described in greater detail, are verified by citations in support of every important statement. The personal phases of the narrative are necessitated by the circumstances, as readers will readily see. Its appalling facts are pregnant with wholesome lessons in the fundamental principles of Americanism. Louis Freeland Post was a well respected journalist, lawyer, publicist, economist, author of many books, and Undersecretary of Labor in the Woodrow Wilson administration. He died in Washington, D.C., in 1928.