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
Battle of Port-en-Bessin attack across the Escures–Port-en-Bessin road cut off the troop defending Escures. The strength of the commando in the port was reduced to 280 men, many of whom were wounded but an ammunition shortage was alleviated by several members of 522 Company Royal Army Service Corps, who drove supplies through German machine-gun and tank fire. The German defences in the harbour area consisted of dispersed strong points, which the marines attacked individually and gradually cleared the harbour in a series of costly attacks. The FLAK ships continued to fire and ammunition ran low. Marine Captain Cousins led reconnaissance patrol towards the