The chariot this group to become one of the most powerful empires in the world. they didn't just adapt the chariot from other groups, they perfected it. their design made it light enough to be carried by two men, and the axle was moved to the rear to increase speed and stability.

The nation you're taking about would be the Egyptians. The Egyptians were an ancient empire that effectively used a chariot as a means of war. They usually equipped soldiers who were on chariots with either spears and or arrows and javelins. This made chariots very deadly. 

Contributing factors  leading  to the harlem renaissance were the great migration of african americans to northern cities, which concentratedambitious  people in places where they could encourage each  other, and the first world war, which had created new industrial work opportunities for tens of thousands of people.

No one knows sorry. : )