The Congress of the United States in fact retains most of the power in these two areas relative to the President and the individual states, with Congress having the power to declare war and confirm ambassadors appointed by the President.
Answer:
The Mexican army attacked them. The main cause of the war was the westward expansion of the United States. All through the 19th century Americans believed it was their right to expand westward. At the time they believed they could conquer the people already living on the land and take it for the United States.
Explanation:
Treaty of Paris ends Spanish-American War. In France, the Treaty of Paris is signed, formally ending the Spanish-American War and granting the United States its first overseas empire. The Spanish-American War had its origins in the rebellion against Spanish rule that began in Cuba in 1895.