The Republic of Texas, or simply Texas, was a sovereign state in North America that existed from March 2, 1836, to February 19, 1846. It shared borders with Mexico, the Republic of the Rio Grande, and the United States of America.

Mexico, officially the United Mexican States, is a country in the southern portion of North America. It covers 1,972,550 km2, making it the world's 13th-largest country by area; with a population of almost 130 million, it is the 10th-most-populous country and the most populous Spanish-speaking country. Mexico is organized as a federal constitutional republic comprising 31 states and Mexico City, its capital. It shares land borders with the United States to the north, with Guatemala and Belize to the southeast; as well as maritime borders with the Pacific Ocean to the west, the Caribbean Sea to the southeast, and the Gulf of Mexico to the east.