This man defeated his once friend Jamukha.
According to legend, this man's funeral escort killed all who crossed their path to keep this man's grave secret. This ruler killed his half-brother Bekhter because Bekhter would not share his hunting spoils, and this man's father Yesugai was poisoned by Tatars. After his ambassador was humiliated by Otrar's governor, this leader crushed the (*) Khwarezmian Empire. This man defeated his once friend Jamukha. This leader conquered the Jin and Western Xia empires, and he may have poisoned his son Jochi to make way for his more able son Ogedai. For 10 points, name this warchief also known as Temujin who united the Mongol tribes.
According to legend, this man's funeral escort killed all who crossed their path to keep this man's grave secret.
Genghis Khan [accept Zingis Khan; accept Chengiz Khan; accept Chinggis Khan; accept Yuan Taizu; accept Cheng Ji Si Han; Dschingis Khan; accept Jenghiz Khan;accept Jinghis Khan; accept Temujin before mentioned]