In 1914, after the United States occupation of Veracruz,  so few Americans were left in Mexico City that the high school was closed after the 1915 class graduated, restarting with a freshman class in 1917.
In 1914, following the US occupation of Veracruz, the American presence in Mexico City decreased significantly, leading to the closure of the high school after the 1915 graduating class. The school resumed operations in 1917 with a new beginning.