Spain the greatest empire of history? LOL. what history books have you been reading?
Spain had the world's largest empire at one point until England took over. Spain ruled over virtually all of South America (excluding Brazil), Mexico, Midwestern America, the Philippines, Some African colonies, and then when Spain briefly took over the Portuguese throne in the 16th century it took over all the Portuguese colonies (Brazil) too.
The fact that Spanish is the third most spoken language in the world today says something.
Besides Spain, Russia, Persia, Egypt, India should also be playable nations.
I find it weird Germany is a nation when it wasn't one until late 1800s.