March 20 in world history: From beginning of the Iraq war to Einstein’s theory that transformed physics

March 20 has been marked by pivotal moments across politics, science, culture, and conflict. From revolutionary ideas to tragic attacks, the day reflects how history unfolds through both progress and crisis.

1345 – Astronomical Theory and the Black Death

In the 14th century, scholars at the University of Paris attempted to explain the devastating spread of the Black Death by linking it to a rare alignment of planets. Though scientifically inaccurate, this theory highlights how medieval societies relied on astrology and limited medical knowledge to understand pandemics that wiped out millions across Europe.

1852 – Uncle Tom’s Cabin Published

Harriet Beecher Stowe published Uncle Tom’s Cabin, a novel that exposed the harsh realities of slavery in the United States. The book became an instant bestseller, selling hundreds of thousands of copies and deeply influencing public opinion in the North, intensifying divisions that would soon lead to the American Civil War.

1916 – Einstein’s Theory Changes Science

Albert Einstein published his general theory of relativity, fundamentally changing how scientists understand gravity, space, and time. The theory introduced the idea that massive objects bend space-time, a concept later confirmed through experiments and still central to modern physics and astronomy.

1969 – John Lennon Marries Yoko Ono

John Lennon married Yoko Ono in Gibraltar. Their relationship became a symbol of peace activism, especially during the Vietnam War, as the couple used their fame to stage protests like the famous “Bed-In for Peace,” blending pop culture with political messaging.

1995 – Tokyo Subway Sarin Attack

The Japanese cult Aum Shinrikyo carried out a coordinated sarin gas attack on Tokyo’s subway system during rush hour. The attack killed 12 people and injured thousands, causing widespread panic and leading to major reforms in Japan’s security and emergency response systems.

2003 – Iraq War Begins

The United States, supported by allies including the United Kingdom, launched a military invasion of Iraq under President George W. Bush. The operation aimed to eliminate alleged weapons of mass destruction and remove Saddam Hussein from power. The war led to years of conflict, significant casualties, and long-term instability in the region.

Other notable events

• 1413 – Henry V Becomes King of England
  Henry V ascended the throne, later becoming known for his military success in the Hundred Years’ War, particularly the Battle of Agincourt.
  
• 1854 – Republican Party Founded
  The Republican Party was established in Wisconsin by anti-slavery activists, eventually becoming one of the two dominant political parties in the United States.
  
• 1956 – Tunisia Gains Independence
  Tunisia declared independence from France, marking a major step in the wave of decolonization across Africa and the Arab world.