États-Unis dans la Première Guerre mondiale
The Carranza government was recognized "de jure" by the United States on August 31, 1917 as a direct consequence of the Zimmermann Telegram to ensure Mexican neutrality during World War I. After the military invasion of Veracruz in 1914, Mexico did not participate in any military excursion with the United States in World War I. That ensured that Mexican neutrality was the best outcome that the United States could hope for even if it allowed German companies to keep their operations in Mexico open.