Kadan (also Qadan) was the son of the second Great Khan of the Mongols Ögedei and a concubine. He was the grandson of Genghis Khan and the brother of Güyük Khan. During the Mongol invasion of Europe, Kadan, along with his cousin Baidar (son of Chagatai Khan) and Orda Khan (the eldest brother of Batu Khan and khan of the White Horde), led the Mongol diversionary force that attacked Poland, while the main Mongol force struck the Kingdom of Hungary.
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Kadan in the context of Mongol invasion of Europe
From the 1220s to the 1240s, the Mongols conquered the Turkic states of Volga Bulgaria, Cumania and Iranian state of Alania, and various principalities in Eastern Europe. Following this, they began their invasion into Central Europe by launching a two-pronged invasion of then-fragmented Poland, culminating in the Battle of Legnica (9 April 1241), and the Kingdom of Hungary, culminating in the Battle of Mohi (11 April 1241). Invasions were also launched into the Caucasus against the Kingdom of Georgia, the Chechens, the Ingush, and Circassia though they failed to fully subjugate the latter. More invasions were launched in Southeast Europe against Bulgaria, Croatia, and the Latin Empire. The operations were planned by General Subutai (1175–1248) and commanded by Batu Khan (c. 1207–1255) and Kadan (d. c. 1261), two grandsons of Genghis Khan. Their conquests integrated much of Eastern European territory into the empire of the Golden Horde. Warring European princes realized they had to cooperate in the face of a Mongol invasion, so local wars and conflicts were suspended in parts of central Europe, only to be resumed after the Mongols had withdrawn. After the initial invasions, subsequent raids and punitive expeditions continued into the late 13th century.
Melik, one of the princes from the Ögedei family who participated in the expedition, invaded the Transylvania region of the Hungarian kingdom, called Sasutsi in sources.