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
German frigate Rheinland-Pfalz (F209) was intercepted by the German frigate and seized by German marines, who captured nine suspects. The German boarding party found a cache of one rocket launcher, three AK-47 rifles, a Tokarev pistol, a carbine and an automatic rifle. This was the first time that the German Navy seized a hostile vessel and her crew at sea since the Second World War. Early in the morning of 30 March 2009, a group of Somali pirates approached the German naval replenishment tanker "Spessart", opened fire upon her and attempted to board the vessel. The attack was averted by the on-board security detachment,