In History, Today on January 20

The Treaty of Benevento is signed between Pope Adrian IV and King William I of Sicily, recognizing William's rule over Sicily.

The first English Parliament to include not only lords but also representatives of the major towns convened at Westminster, marking a significant step in the development of the parliamentary system.

Duke Wladyslaw I of Poland is crowned king, marking the beginning of the reunification of Poland after a period of fragmentation.

King Charles I of England went on trial for treason and other high crimes against the realm. This trial eventually led to his execution.

The Kingdom of Great Britain signed a preliminary peace treaty with France, marking the end of hostilities in the American Revolutionary War.

Hong Kong Island was occupied by the British during the First Opium War, leading to its eventual cession to Britain and becoming a significant colonial outpost.

The United States Senate allowed the Navy to lease Pearl Harbor as a naval base, which later became a pivotal location in World War II.

King George V of the United Kingdom died, and his son, Edward VIII, ascended to the throne, leading to a significant constitutional crisis later that year.

The Wannsee Conference was held in Berlin, where Nazi officials discussed and coordinated the implementation of the 'Final Solution,' the plan to exterminate the Jewish population of Europe.

Franklin D. Roosevelt was inaugurated for an unprecedented fourth term as President of the United States.

John F. Kennedy was inaugurated as the 35th President of the United States, delivering his famous inaugural address with the line 'Ask not what your country can do for you—ask what you can do for your country.'

Ronald Reagan was inaugurated as the 40th President of the United States. On the same day, 52 American hostages were released from Iran after 444 days in captivity.

The United States observed Martin Luther King Jr. Day as a federal holiday for the first time, honoring the civil rights leader's contributions to American society.

George W. Bush was inaugurated as the 43rd President of the United States.

George W. Bush was inaugurated for his second term as President of the United States.

Barack Obama was inaugurated as the 44th President of the United States, becoming the first African American to hold the office.

Barack Obama was inaugurated for his second term as President of the United States.

Donald Trump was inaugurated as the 45th President of the United States.

Joe Biden was inaugurated as the 46th President of the United States, with Kamala Harris becoming the first female Vice President.

Microsoft announced its acquisition of Activision Blizzard for $68.7 billion, marking one of the largest acquisitions in the tech industry.