- It's was around the time of ancient Egypt.
- There is very few written remains of the civilization.
- The Indus Valley Civilization covered the largest area of any civilization until the rise of Persia more than 1,000 years later.
- Their cities rivaled those of Sumer.

Geography:

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Indus River Valley civilization

Decline:

- Historians are not sure why the declined
- Aryan tribes from Central Asia went through the Khyber river pass & conquered the Indues people
- The use of writing halted
- Mohenjo-Daro was completely abandoned
- Tons of river mud found in the streets might suggest a major flood had happened