Mexican Revolution revolution was in 1914, during the "Ypiranga" incident. When United States intelligence agents received word that the "Ypiranga", a German merchant ship, contained illegal firepower for Huerta, President Wilson ordered American troops to the port of Veracruz to stop the ship from docking. Wilson never actually declared war on Mexico. The United States skirmished with Huerta's troops in Veracruz. The "Ypiranga" successfully docked at another port and unloaded the arms, which greatly angered Wilson. The ABC Powers arbitrated and U.S. troops left Mexican soil, but the incident added to already tense Mexican-American relations. In 1916, in retaliation for Pancho Villa's
Action of 9 April 1914 the Siege of Mazatlan, where she ran aground in the harbor and over time was destroyed by both the rebel and federal forces. Action of 9 April 1914 The Action of 9 April 1914 was an important turning point in naval and aviation history. On the said date one of the first naval/air skirmishes took place. This engagement took place off the coast of western Mexico during the Mexican Revolution. The action was part of the naval campaign off Topolobampo at the edge of the Gulf of California. A Constitutionalist biplane dropped bombs on two Huertista gunboats; they all missed.