In History, Today on October 20

The First Crusade: Crusaders led by Godfrey of Bouillon began the Siege of Antioch, a pivotal event in the First Crusade aimed at capturing the city from the Seljuk Turks.

Maria Theresa became the ruler of the Habsburg dominions following the death of her father, Charles VI, leading to the War of Austrian Succession.

The United States Senate ratified the Louisiana Purchase Treaty, effectively doubling the size of the United States.

The Convention of 1818 was signed between the United States and the United Kingdom, establishing the 49th parallel as the border between the U.S. and British North America.

The Battle of Navarino took place during the Greek War of Independence, where a combined British, French, and Russian fleet defeated the Ottoman and Egyptian armada.

The Metropolitan Opera House in New York City opened with a performance of Gounod's 'Faust'.

General Douglas MacArthur returned to the Philippines, fulfilling his famous promise, "I shall return," during World War II.

Jacqueline Kennedy married Greek shipping magnate Aristotle Onassis, a significant event in the life of the former First Lady of the United States.

The Saturday Night Massacre occurred when U.S. President Richard Nixon ordered the firing of Watergate special prosecutor Archibald Cox, leading to the resignations of Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus.

The ferry MV George Prince was struck by a tanker on the Mississippi River near New Orleans, Louisiana, resulting in the deaths of 78 people in one of the deadliest ferry disasters in U.S. history.

The Boston Red Sox defeated the New York Yankees in Game 7 of the American League Championship Series, becoming the first team in Major League Baseball history to win a best-of-seven series after losing the first three games.

Muammar Gaddafi, the deposed leader of Libya, was captured and killed by rebel forces in his hometown of Sirte, marking the end of his 42-year rule and a significant moment in the Libyan Civil War.

Joko Widodo was inaugurated as the President of Indonesia, becoming the first Indonesian president not to come from the country's political elite or military background.

Justin Trudeau was elected as the Prime Minister of Canada, leading the Liberal Party to a majority government in the federal election, ending nearly a decade of Conservative rule under Stephen Harper.

The United Nations announced that the Islamic State had been driven out of Raqqa, Syria, marking a significant defeat for the militant group.

A caravan of migrants from Central America began its journey northward, drawing international attention as it moved through Mexico towards the United States border, highlighting issues of immigration and asylum.

Protests erupted in Chile over a metro fare increase, leading to widespread demonstrations against inequality and prompting the government to declare a state of emergency.