No Native America

In No Native America, because of higher tempertures, the POD is that the ice bridge that connected Asia to North America melts before humans can settle in the Western Hemisphere. This leads to to two major differances which are discussed in the next part.

Major Differances
The first major differance, is pretty obvious, is that they're are no Natives to the Western Hemisphere. The second, less obvious effect, is that all the people (that in OTL are Native Americans) are memebers of the Chukchee tribe, in north-eastern Siberia.

Chukchee Civilization
Because of the high population, a civilization in the Chukchee homeland is delveloped as early as 250 a.d. A unified monarchy arose around the city-state of Rom Xoht (Great City in Chukchee), in 463 a.d.. This was the Xohtian dynasty. Another city named Ususpner (Garden) rebelled and created the Ususparian Dynasty, in 883 a.d.. This was the golden age of ancient Chukchia, and during this time contact with China was made. Thsrep ( Sky Blue), which was the last of the three main Chukchee cities, created its own dynasty in 1204, the Thrasp Dynasty. However during its brief reign ( it only lasted till 1217) the empire of the Chukchee, which had greatly expanded under the past two dynasties, declined and was very unstablle. It is likley that it would have ended around the 1260 even if the Mongols hadn't invaded.

Mongol and Russian Invasions
Genghis Khan started an invasion of the Thrasp dynasty and several months later it collapsed, in 1217. Chukchia was spared from devastation, partly because the Chukchees were one of the few people who followed the same religion as the Mongols (Tengrilism) and were very much similiar to the mongols culturally and ethnically. Chukchees were also all-to-happy to see the Thrasp Dynasty go. In Chukchia, most eduacated Chukchees learned Mongolian.