| 26371 | March 9 | Event | 1765 – After a campaign by the writer Voltaire, judges in Paris posthumously exonerate Jean Calas of murdering his son. Calas had been tortured and executed in 1762 on the charge, though his son may have actually committed suicide. |
| 26372 | March 9 | Event | 1796 – Napoléon Bonaparte marries his first wife, Joséphine de Beauharnais. |
| 26373 | March 9 | Event | 1811 – Paraguayan forces defeat Manuel Belgrano at the Battle of Tacuarí. |
| 26374 | March 9 | Event | 1841 – The U.S. Supreme Court rules in the United States v. The Amistad case that captive Africans who had seized control of the ship carrying them had been taken into slavery illegally. |
| 26375 | March 9 | Event | 1842 – Giuseppe Verdi's third opera, Nabucco, receives its première performance in Milan its success establishes Verdi as one of Italy's foremost opera writers. |
| 26376 | March 9 | Event | 1842 – The first documented discovery of gold in California occurs at Rancho San Francisco, six years before the California Gold Rush. |
| 26377 | March 9 | Event | 1847 – Mexican–American War: The first large-scale amphibious assault in U.S. history is launched in the Siege of Veracruz. |
| 26378 | March 9 | Event | 1862 – American Civil War: The USS Monitor and CSS Virginia fight to a draw in the Battle of Hampton Roads, the first battle between two ironclad warships. |
| 26379 | March 9 | Event | 1896 – Prime Minister Francesco Crispi resigns following the Italian defeat at the Battle of Adwa. |
| 26380 | March 9 | Event | 1908 – Inter Milan was founded on Football Club Internazionale, following a schism from the Milan Cricket and Football Club. |
| 26381 | March 9 | Event | 1910 – The Westmoreland County coal strike, involving 15,000 coal miners represented by the United Mine Workers, begins. |
| 26382 | March 9 | Event | 1916 – Mexican Revolution: Pancho Villa leads nearly 500 Mexican raiders in an attack against the border town of Columbus, New Mexico. |
| 26383 | March 9 | Event | 1925 – Pink's War: The first Royal Air Force operation conducted independently of the British Army or Royal Navy begins. |
| 26384 | March 9 | Event | 1933 – Great Depression: President Franklin D. Roosevelt submits the Emergency Banking Act to Congress, the first of his New Deal policies. |
| 26385 | March 9 | Event | 1944 – World War II: Japanese troops counter-attack American forces on Hill 700 in Bougainville in a battle that would last five days. |
| 26386 | March 9 | Event | 1944 – World War II: Soviet Army planes attack Tallinn, Estonia. |
| 26387 | March 9 | Event | 1945 – The Bombing of Tokyo by the United States Army Air Forces begin, one of the most destructive bombing raids in history. |
| 26388 | March 9 | Event | 1945 – World War II: A coup d'état by Japanese forces in French Indochina removes the French from power. |
| 26389 | March 9 | Event | 1946 – Bolton Wanderers stadium disaster at Burnden Park, Bolton, England, kills 33 and injures hundreds more. |
| 26390 | March 9 | Event | 1954 – McCarthyism: CBS television broadcasts the See It Now episode, "A Report on Senator Joseph McCarthy", produced by Fred Friendly. |
| 26391 | March 9 | Event | 1956 – Soviet forces suppress mass demonstrations in the Georgian SSR, reacting to Nikita Khrushchev's de-Stalinization policy. |
| 26392 | March 9 | Event | 1957 – A magnitude 8.3 earthquake in the Andreanof Islands, Alaska triggers a Pacific-wide tsunami causing extensive damage to Hawaii and Oahu. |
| 26393 | March 9 | Event | 1959 – The Barbie doll makes its debut at the American International Toy Fair in New York. |
| 26394 | March 9 | Event | 1960 – Dr. Belding Hibbard Scribner implants for the first time a shunt he invented into a patient, which allows the patient to receive hemodialysis on a regular basis. |
| 26395 | March 9 | Event | 1961 – Sputnik 9 successfully launches, carrying a human dummy nicknamed Ivan Ivanovich, and demonstrating that Soviet Union was ready to begin human spaceflight. |
| 26396 | March 9 | Event | 1967 – Trans World Airlines Flight 553, a Douglas DC-9-15, crashes in a field in Concord Township, Ohio following a mid-air collision with a Beechcraft Baron, killing 26. |
| 26397 | March 9 | Event | 1976 – Forty-two people die in the 1976 Cavalese cable car disaster, the worst cable-car accident to date. |
| 26398 | March 9 | Event | 1977 – The Hanafi Siege: In a thirty-nine-hour standoff, armed Hanafi Muslims seize three Washington, D.C., buildings, killing two and taking 149 hostage. |
| 26399 | March 9 | Event | 1989 – Financially troubled Eastern Air Lines files for bankruptcy. |
| 26400 | March 9 | Event | 1991 – Massive demonstrations are held against Slobodan Milošević in Belgrade. |