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.
Following the US military occupation of Veracruz in 1914, the number of Americans in Mexico City declined substantially, prompting the closure of the high school after the 1915 graduation. The school reopened in 1917 with a renewed focus on education.