Order of the Dragon

The Order of the Dragon (Latin: Societas Draconistarum, literally "Society of the Dragonists") was a monarchical chivalric order for selected nobility, founded in 1408 by Sigismund who was King of Hungary (r. 1387–1437) at the time and later became Holy Roman Emperor (r. 1433–1437). It was fashioned after the military orders of the Crusades, requiring its initiates to defend the cross and fight the enemies of Christianity, in particular the Ottoman Empire.

The Order flourished during the first half of the 15th century, primarily in Germany and Italy. After Sigismund's death in 1437, its importance declined in Western Europe, but after the Fall of Constantinople in 1453, it continued to play a role in Hungary, Serbia, Croatia and Wallachia which bore the brunt of the Ottoman incursions.

Sigismund faced fierce struggles for power leading up to the foundation of the order in 1408. In 1387, the Bohemian royal son Sigismund of Luxembourg was elected King of Hungary and Croatia, a title which he owed chiefly to his marriage to Queen Mary of Hungary in 1385, without her consent. During the next decade, he constantly sought support or employed ruthless methods to strengthen his unsteady hold on the throne. His rule was weakened in 1395 when Mary, who was pregnant, died in a horse riding accident. In 1389, the Ottoman Sultan Murad I fought Lazar, Prince of Serbia at the Battle of Kosovo Polje, in which both leaders died, leading to an uncertain outcome of the battle. Two years later, the Turks had taken the Bulgarian fortress of Nicopolis.

...
Wikipedia