As this 1917 article correctly predicted, many European immigrants to the U.S. later moved back to Europe after the conclusion of World War I. By some estimates, that number was almost one-third of European immigrants to America. However, “relatively few” German-Americans returned back to Germany.

Immigration Tide May Turn From West to East: Millions of Our Foreign-Born Citizens Planning to Return to Europe After the War, Says Commissioner Frederic C. Howe (PDF)

From Sunday, October 14, 1917