These two violent, nomadic herding cultures swept out of Northern Asia to come into conflict with the Indus Valley People. What were these cultures?

Your book may be looking for the Aryans. However, most historians today don't believe that Aryans were the conquerors and that the Indus Valley civilization was not destroyed by Aryans.

http://www.indiana.edu/~isp/cd_rom/mod_09/mod_09_x.htm

Yes, but I need TWO cultures.

I just can't seem to find the other one.

http://www.fantasticmetropolis.com/i/tanelorns-seed/full/

http://www.omilosmeleton.gr/english/agarwal.html

which route did captain geoge vancouver travel?

The two violent, nomadic herding cultures that swept out of Northern Asia to come into conflict with the Indus Valley People were the Aryans and the Huns.

To find this information, you can follow the steps below:

1. Start by conducting a basic internet search using keywords like "violent nomadic herding cultures Northern Asia" or "cultures that came into conflict with the Indus Valley People."

2. Look for reliable sources such as history websites, academic journals, or books that specialize in the history of ancient civilizations.

3. Once you have identified a few potential sources, read through the information provided to gather details about the cultures in question.

4. Pay attention to the historical context, geographical references, and cultural characteristics mentioned in the sources.

5. Cross-reference information from different sources to ensure accuracy and to get a more comprehensive understanding.

By following these steps, you should be able to gather reliable information regarding the two cultures that came into conflict with the Indus Valley People, namely the Aryans and the Huns.