This Day in History

USSR Expelled from the League of Nations (1939)
The League of Nations was an international confederation of countries created after World War I and disbanded following World War II when many of its functions were transferred to the United Nations. The League collapsed when faced with threats to international peace from all sides in the 1930s, including the Spanish civil war, Japan's resumption of war against China, and the appeasement of Adolf Hitler at Munich. Its last important act was to expel the Soviet Union in 1939 for doing what? Discuss

Council of Trent Convened (1545)
The Council of Trent made sweeping reforms to the Catholic Church over 18 years, eliminating many abuses criticized in the Protestant Reformation. Convened by Pope Paul III at Trento, Italy—28 years after Martin Luther issued his 95 Theses—the council fixed the canon of the Old and New Testaments, set the number of sacraments at seven, defined the nature of original sin, and confirmed the doctrine of transubstantiation. How many years was it until the next ecumenical council?

Clapham Junction Rail Crash (1988)
Near London on the morning of December 12, 1988, the driver of the 7:18 train from Basingstoke to Waterloo saw a signal in front of him abruptly change from green to red. He stopped his train and called the signalman, who told him to proceed. Before he could, however, the 6:14 from Poole rammed into his train's rear at about 40 mph (64 km/h). Then, an empty train traveling in the opposite direction hit the wreckage. The crashes killed 35 and injured hundreds more. What caused the signal failure?