Contiguous United States
The Mexican Cession added 600,000 square miles of territory to the United States, including a long Pacific coastline. The treaty also recognized the annexation of Texas and acknowledged American control over the disputed territory between the Nueces River and the Rio Grande. Mexico, in turn, received $15 million. The war had cost the lives of nearly 14,000 Americans and 25,000 Mexicans, and had cost the United States roughly one hundred million dollars. With the exception of the territory acquired by the 1853 Gadsden Purchase, the territorial acquisitions under Polk established the modern borders of the Contiguous United States.