1. George Bannerman Dealey, a prominent Dallas businessman and publisher, was born on November 20, 1859. He is most well-known for founding The Dallas Morning News, which became one of the largest and most influential newspapers in Texas.

2. On November 20, 1861, the Confederate government officially recognized the Chickasaw Nation as an independent ally. The Chickasaws had supported the Confederacy during the Civil War and were rewarded with official recognition and a promise of protection from the Confederacy.

3. In 1906, the Texas State Fairgrounds officially opened in Dallas on November 20. The State Fair of Texas has become one of the largest and most well-known state fairs in the country.

4. On November 20, 1925, Robert R. Mutchler became the first African American to earn a degree from the University of Texas at Austin. Mutchler went on to become a civil rights activist and attorney.

5. In 1945, the Nuremberg Trials began on November 20. These trials were a series of military tribunals held in Nuremberg, Germany, that prosecuted prominent political and military leaders of Nazi Germany for war crimes and crimes against humanity committed during World War II. Many of the defendants were convicted and sentenced to prison or death.