may 16, 320 - Beginning of the Gupta Empire
Description:
The Gupta empire lasted from 320 to 550 CE. In that time period, many internal roads were built. Furthermore, the numeric system was created during the Gupta empire. I think that the numeric and mathematic system was crucial to the development of the Indus Valley system.Added to timeline:
Date:
may 16, 320
Now
~ 1707 years ago