So in this cosmology I'm developing portals between worlds open from time to time and large numbers of one world can get stuck in another world. Earth is one of the worlds that are in this cosmology and such an event like this happens.
13 portals around Earth open up and about 10,000 people come through each of the portals. On the Prime World all 13 portals land to 1 place, depositing all the ~130,000 Earthlings in 1 place. All they have is what they were carrying or they dragged with them. So no house magically got pull through for example.
This happens about ~1000 BCE
These are the cultures that these people are pulled from:
- The Zhou
- The Olmec
- The Greeks
- The Khmer
- The Vedic Culture
- The Adena Culture
- The Maya
- Jomon Culture
- Teutonic Culture
These groups are all dropped in the same location which for reference is about 10 degrees south of the equator. There is a good size lake directly to the north. They can travel Northwest to about 10 degrees north of the equator. They're in the center (horizontally) of a region that is, from eyeing it, about the size of europe with a border west of mountains that are not impassible, but not an easy trek to get through. To the east, midway between them and the coast is an open mountain range. Other than the Northwesterly direction they are pretty close to the coast. To the South however they can get to about 50 degrees south before they hit a coast and mountains. The general climate of the region is of a forest.
The basic future history plan at this point is that these people spread out, colonize this area, an area past the western mountains, and a smaller continent to the north. There are other races that they'll run into in the future as they spread, but that doesn't matter at the moment. In fact neither does the above description of their surrounding, the area is big enough that they only really know they are in a forest with a Lake to the North and perhaps a coast to the north East within the time frame I care about for this question.
The question here is basically, What happens? How do these 13 groups react to each other and their situation? Which groups would likely ally? likely become enemies with? likely just quickly move away from this group? likely set up settlements? And which ones would come to dominate these settlements?
And for clarification I'm not asking "would Bob kill Susan." That's ultimately my decision. I'm asking, these are cultures that existed in history and they are known to have alliances, interactions, positions on foreigners so what would their take be on these other groups?
Also note, that while there is magic, monsters, and such in this world they would play no role in any of what would happen after the portal transports them. They would not run into any of that stuff within a few generations of this happening so it doesn't need to be taken into account.
Side Note: I realize that to answer this takes knowledge from that time period and of these cultures which most will only have or want to contribute partially, and not to mention the full answer will probably be really long, so feel free to answer for only the cultures you know about if you can't get all of them, and perhaps I can get the full answer from those partials.