Answer:
speeches, manuscripts, letters, interviews, records, eyewitness accounts, autobiographies.
Napoleon Bonaparte was the French ruler
Calvin<span> made a powerful </span>impact<span> on the fundamental doctrines of Protestantism, and is widely credited as the most important figure in the second generation of the Protestant </span><span>Reformation</span>
Joseph Stalin was the powerful and ruthless leader of the soviet union from 1929-1953
That would depend on the time period. There was conflict between India and Britain, ranging from 1700 to 1798, so if you could specify a time period, I could help more.