Why did crops spread easily in Europe and Asia? Why did this spread not happen in the Americas? Horses that made them appear like god-like half man, half beast warriors, body armor, guns, and steel swords.

But for Europe and Asia, the primary axis is east-west. ... Many crops spread across Asia with one domestication, while crops like cotton or squash were domesticated in multiple individual areas throughout Mesoamerica. This is because the crop spread too slowly for one domestication to takeover the region.

The Russo-Japanese War showed the United States' growing role in world affairs after US President Theodore Roosevelt negotiated and convinced the two sides to sign a peace treaty to end the war. This showed that United States has a power and large influence in most country's decisions.