United States involvement in the Mexican Revolution with its diplomatic and economic rivals in Mexico, particularly Great Britain and Germany, meant that foreign powers affected the way the Mexican situation played out. When U.S. agents discovered that the German merchant ship, the "Ypiranga", was carrying arms to Huerta's regime, President Wilson ordered troops to the port of Veracruz to stop the ship from docking. The U.S. did not declare war on Mexico city but the U.S. troops carried out a skirmish against Huerta's forces in Veracruz. The "Ypiranga" managed to dock at another port, which infuriated Wilson. On April 9, 1914, Mexican officials in the port of
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.