After Oirat nobel Amursana's request to be declared Dzungar khan went unanswered, he led a revolt against the Qing. Qing attention became temporarily focused on the Khalka prince Chingünjav, a descendant of Genghis Khan, who between the summer of 1756 and January 1757 mounted the most serious Khalka Mongol rebellion against the Qing until its demise in 1911. Before dealing with Amursana, the majority of Qianlong's forces were reassigned to ensure stability in Khalka until Chingünjav's army was crushed by the Qing in a ferocious battle near Lake Khövsgöl in January, 1757. After the victory, Qianlong dispatched additional forces to Ili where they quickly routed the rebels. Amursana escaped for a third time to the Kazakh Khanate, but not long afterwards Ablai Khan pledged tributary status to the Chinese, which meant Amursana was no longer safe. Over the next two years, Qing armies destroyed the remnants of the Dzungar khanate. The Qing Manchu Bannermen carried out the Dzungar genocide (1755-1758) on the native Dzungar Oirat Mongol population, nearly wiping them from existence and depopulating Dzungaria.