>>12850932Because no country in the east really had a as much of an impact on history as Europe did. With the exceptions being the many Chinese dynasties, Japan, the Ottoman Empire, various Persian Empires, and a couple of Khanates there really is not as much to cover.
Historically China nearly became a colonial power in the 1400s and Japan was one very briefly. But beyond that there is very little to really talk about when compared to Europe.
But as far as the Americas, only the United States, Mexico/New Spain, are really noteworthy for history.
Sub-Saharan Africa for all but a few empires was really not much of anything until the first colonies got started there.