Mexico i will provide you with the land you need for the railroad
This agreement set the boundary between the United States and Canada at the 49th parallel west of the Rocky Mountains, veering around Vancouver Island and then proceeding through the Strait of San Juan de Fuca.
and the treaty was signed by both Britain and u.s
The Republic of Texas declared independence from the Republic of Mexico on March 2, 1836.
Gadsden's Purchase provided the land necessary for a southern transcontinental railroad and attempted to resolve conflicts that lingered after the Mexican-American War .