Answer:
The event that initiated Islam's rise to power in India was the gradual Muslim conquest by the Mughal Empire
Only the federal government can sign treaties.
Hope that helps.
The second one, Bolsheviks and anti-tsarists
Answer:
I would say because they had no way to preserve them other than to pass them on to their kids, think about it I am certain most slave owners couldn't have care less about their slaves songs, they had no reason to preserve them.