 In practice, when no male heir is mature enough, a female heir is usually determined "pragmatically", by proximity to the last monarch, like Boariks of the Caucasian Huns or Tamiris of Massagetes in Middle Asia.The lateral monarch is generally elected after the leadership throne becomes vacant.In the early years of the Mongol empire, the death of the ruling monarchs, Genghis Khan and Ögedei Khan, immediately stopped the Mongol western campaigns because of the upcoming elections.