YouTube user Ollie Bye publishes animations that walk viewers through the history of nations, wars, and other related subjects. One of the most recent and fascinating outputs is the entire history of India. While the video starts in 2800 BCE, it isn't until 413 BCE that we have consistent year to year coverage. As the video notes, this is because of the extreme timescales of the Indus Valley and Vedic periods. From 413 BCE on, the Indian territories rapidly change powers until the takeover by the British East India Company. Watch the video below.
If you enjoyed that video, Ollie Bye gave the whole world a similar treatment.