17, when the rebel leader "Red" López gets drunk. April 18 – , a 5,557-ton Portuguese passenger liner en route from Mozambique to Lisbon, strikes Bellows Rock just off Cape Point and sinks. April 19 – Mexican Revolution: Francisco I. Madero's troops besiege Ciudad Juárez, but General Juan J. Navarro refuses his surrender demand. April 22 – A passenger train from Port Alfred to Grahamstown, South Africa derails on the Blaauwkrantz Bridge, and plunges into the ravine below, killing 31 and seriously injuring 23. April 26 – HŠK Građanski Zagreb (predecessor of GNK Dinamo Zagreb), a Croatian Association football club, is founded in Zagreb. April 27 – Huanghuagang Uprising: In China, rebels take five villages in an attempt to create a power base to fight Imperial rule; those who die are remembered as "The 72 Martyrs" (the event is also called the "Second Guangzhou Uprising" and the "Yellow Flower Mound Revolt"). May May 8 – Mexican Revolution: Pancho Villa launches an attack against government troops in Ciudad Juárez without Madero's permission; the government troops surrender on May 10. May 13–15 – Mexican Revolution: Torreón massacre – Over 300 Chinese residents are massacred by the revolutionary forces of Francisco I. Madero, in the Mexican city of Torreón. May 15 –Standard Oil is dissolved by the Supreme Court of the United States into 34 separate oil companies including Exxon, Mobil, Chevron, Texaco, and others due to violation of the Sherman Anti-Trust Act May 17 – Mexican Revolution: Porfirio Díaz is convinced to resign, but does not do so yet. May 21 – Mexican Revolution: In Ciudad Juárez, a peace treaty is signed between Madero's rebels and government troops. May 24 – Mexican Revolution: Government troops fire at anti-Diaz demonstrators in Mexico City, killing about 200 (officials claim only 40). May 25 – Mexican Revolution: Porfirio Díaz signs his resignation and leaves for Veracruz; on May 31 he leaves for exile in France. May 30 – The very first Indianapolis 500 automobile race is held in the United States, won by Ray Harroun at an average speed of 74.59 miles per hour. May 31 – The hull of the is launched in Belfast, on the same day starts her sea trials. June June 7 – Mexican Revolution: Francisco Madero arrives in Mexico City, just after the 1911 Michoacán earthquake. June 14 – departs Southampton, England, for her maiden voyage, with a first call