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On This Day in History: December 9

Explore the historical events that shaped our world on December 9th. From major milestones to cultural achievements, see what happened on this day in history. Dates for earlier events may be approximate.

Belisarius, a Byzantine general, enters Rome on December 9, 536 AD right after retaking the city from the Ostrogoths during the Gothic War, as the Ostrogothic forces were simultaneously leaving the city. 

Our Lady of Guadalupe, one of the most important religious icons in Mexico, is believed to have appeared to Juan Diego on four occasions between December 9 and 12, 1531. More

The Ottoman Empire declares war on Venice, initiating the Seventh Ottoman-Venetian War. The war concluded two years later in 1718 with an Ottoman victory and the Treaty of Passarowitz. 

Jerusalem surrenders to British troops. The mayor of Jerusalem, Hussein Salim al-Husseini, delivers the Ottoman Governor's letter surrendering the city to Brigadier General C.F. Watson, of the 180th Brigade. 

The John Birch Society (JBS) is founded by Robert W. Welch Jr. More

Tanzania National day. It is celebrated on the anniversary of Tanganyika and Zanzibar gaining independence from British colonial rule on December 9, 1961. Tanganyika and Zanzibar came together to form a single country – the United Republic of Tanzania on April 26, 1964.

Douglas Engelbart, gives a landmark computer demonstration at the Association for Computing Machinery / Institute of Electrical and Electronics Engineers (ACM/IEEE)—Computer Society's Fall Joint Computer Conference in San Francisco". 

The World Health Assembly declares smallpox, a serious infectious disease, eradicated (eliminated). No cases of naturally occurring smallpox have happened since. More

The Intifada begins in the Israeli-occupied Gaza Strip twenty years after Israeli conquered the Gaza Strip and the West Bank and annexed East Jerusalem. 

Lech Walesa, founder of the Solidarity movement and Polish anti-communist leader is elected Poland's first democratically elected President on December 9, 1990. He won a landslide victory in the first free presidential election in Poland marking a key moment in Eastern Europe's shift from communism.