Wow! That's interesting. Anything else you can tell me? 
 This is fantastic! Keep pouring out the history lesson, I want to know more. 
 What can you tell me about India? 
 After the 10th century , Muslim Central Asian nomadic clans , using swift-horse cavalry and raising vast armies united by ethnicity and religion , repeatedly overran South Asia 's north-western plains , leading eventually to the establishment of the Islamic Delhi Sultanate in 1206 . 
 That's interesting. Do you know anything about their history?
After the 10th century , Muslim Central Asian nomadic clans , using swift-horse cavalry and raising vast armies united by ethnicity and religion , repeatedly overran South Asia 's north-western plains , leading eventually to the establishment of the Islamic Delhi Sultanate in 1206 .