Unlike Britain, France, and Russia, the United States has never faced a full on war on its own soil (although some include the War of 1812 in this category)--due mostly to the fact that the US has been so well protected by the Atlantic and Pacific oceans.
Answer: Spanish leaders formed alliances with some of the Indian tribes and provided them with tools, crops, livestock, and arms. The new materials available to these tribes gave them superior weaponry over their enemies. As Indians acquired horses, they became more mobile.
Explanation:
The answer is d ( it was the first example of self-government in the new world ) .