Guptas and Mauryas came after Christ .. much later . ..

Vaidik period began around five thousand years before Christ .. The history was well documented in `Mahabharata` . In fact - Mahabharata was the first historical narrative .. kinda wikipedia of that time :-)

It was transated into English first by Kishori Mohan Ganguly in 1896 .. https://mahabharata.shutri.com/