Failed attempt by exiles to attack the Cuban Army at the Moncada Barracks. The battle served as inspiration, and the motto, for the successful Cuban Revolution led by Fidel Castro later in the decade. http://en.wikipedia.org/wiki/26th_of_July_Movement
A ten-year-long insurgency led by Francisco Madero, Emanuel Zapata, Pancho Villa and others to institute social and economic reform in Mexico. The uprising led to the new, more liberal, Constitution. http://en.wikipedia.org/wiki/Mexican_Revolution
Led by Eugene Debs, 3,000 employees of the Pullman rail car company went on strike because of wage reductions. Eventually 125,000 workers across the country joined in solidarity. The protests were eventually broken up by federal troops. President Grover Cleveland made Memorial Day a federal holiday to mark the events. http://en.wikipedia.org/wiki/Pullman_Strike
More than 1,000 colonists occupied Bunker Hill and Breed's Hill in Boston to prevent the British Troops from setting up camp there. While the colonists eventually retreated, the British lost hundreds of troops in the skirmish. http://en.wikipedia.org/wiki/Battle_of_Bunker_Hill