Why did native americans build mounds.

The articles of confederation did not allow the government the power to tax or to force the states to do anything. what challenges could this cause

During the era of european expansion, what was the biggest reason for spain’s push for exploration?

Why did trade along the silk road increase after it fell under mongol control? o people stopped using camels the mongols paved the road o it became safer to travel the mongols were better traders next question ask for