no taxation without representation.
The relationship was not good because they disagreed about where the Texas- Mexico border.
The war—in which U.S. forces were consistently victorious—resulted in the United States' acquisition of more than 500,000 square miles (1,300,000 square km) of Mexican territory extending westward from the Rio Grande to the Pacific Ocean
The Europeans weren't all that interested in having much of Africa because they didn't know at the time about the gold and diamonds Africa's land had to offer.
