The Military Order of Maria Theresa (German: Militär-Maria-Theresien-Orden, Hungarian: Katonai Mária Terézia-rend, Czech: Vojenský řád Marie Terezie, Polish: Wojskowy Order Marii Teresy, Slovene: Vojaški red Marije Terezije, Croatian: Vojni Red Marije Terezije was an Order of the Austro-Hungarian Empire founded on 18 June 1757, the day of the Battle of Kolin, by the Empress Maria Theresa to reward especially meritorious and valorous acts by commissioned officers, including and especially the courageous act of defeating an enemy, and thus "serving" their monarch. It was specifically given for "successful military acts of essential impact to a campaign that were undertaken on [the officer's] own initiative, and might have been omitted by an honorable officer without reproach." This gave rise to a popular myth that it was awarded for (successfully) acting against an explicit order. It is considered to be the highest honor for a soldier in the Austrian armed services.
Originally, the order had two classes: the Knight's Cross and the Grand Cross. On 15 October 1765, Emperor Joseph II added a Commander's Cross and a breast star to be worn by holders of the Grand Cross.
A prospective awardee was considered only in regard to their military service record; their ethnicity, birth and rank (as long as they were a commissioned officer) were irrelevant. Knight's Cross recipients were automatically ennobled with the title of Ritter in the Austrian nobility for life, and admitted to court. Upon further petition, they could also claim the hereditary title of Baron (Freiherr). They were also entitled to a pension. Widows of the order's recipients were entitled to half of their spouse's pension during the remainder of their lives.