From Marcus Garvey's 1923 essay "Who and What is a Negro?":
The New York World under date of January 15, 1923, published a statement of Drs. Clark Wissler and Franz Boaz (the latter a professor of anthropology at Columbia University), confirming the statement of the French that Moroccan and Algerian troops used in the invasion of Germany were not to be classified as Negroes, because they were not of that race. How the French and these gentlemen arrive at such a conclusion is marvelous to understand, but I feel it is the old-time method of depriving the Negro of anything that would tend to make him recognized in any useful occupation or activity.
The Moroccans and Algerians have a splendid opportunity of proving the real worth of the Negro in Europe, and who to tell that one day Africa will colonize Europe, even as Europe has been endeavoring to colonize the world for hundreds of years.