• 1244 – Following their successful siege of Montségur, French royal forces burned about 210 Cathar Perfecti and unrepentant credentes.


• 1836 - The Republic of Texas approved a constitution.


• 1935 - Adolf Hitler scrapped the Treaty of Versailles.

• 1926 – American scientist Robert H. Goddard launched the world's first liquid-fueled rocket, which flew for two-and-a-half seconds before falling to the ground.
 
Robert Hutchings Goddard (October 5, 1882 – August 10, 1945) was an American engineer, professor, physicist, and inventor who is credited with creating and building the world's first liquid-fueled rocket, which he successfully launched on March 16, 1926. Goddard and his team launched 34 rockets between 1926 and 1941, achieving altitudes as high as 2.6 km (1.6 mi) and speeds as high as 885 km/h (550 mph).

Goddard's work as both theorist and engineer anticipated many of the developments that were to make spaceflight possible.[4] He has been called the man who ushered in the Space Age. Two of Goddard's 214 patented inventions — a multi-stage rocket (1914), and a liquid-fuel rocket (1914) — were important milestones toward spaceflight.[6] His 1919 monograph A Method of Reaching Extreme Altitudes is considered one of the classic texts of 20th-century rocket science. Goddard successfully applied three-axis control, gyroscopes and steerable thrust to rockets, to effectively control their flight.