While Mexico has a land area of 1,972,550 square kilometers (761,606 sq mi), the United States has some 9,826,675 square kilometers (3,794,101 sq mi). This roughly means five countries the size of Mexico would neatly fit inside the United States.
Another way of looking at such size difference is that Mexico is roughly three times the size of Texas, or approximately the size of Alaska.
the united states
the United states paid Mexico $15 million dollars for this land, which became known as the mexican cession
A country because on a map Mexico and Canada which are countries are way larger than the states.
Canada or Mexico
Mexico (the country) qualifies as such.
The only country with a land border with the southern US is Mexico. However, some other nearby countries are Cuba and the Bahamas.
The states that have a land border with another country are Alaska (Canada), Maine (Canada), Washington (Canada), Michigan (Canada), Minnesota (Canada), North Dakota (Canada), Montana (Canada), New York (Canada), Vermont (Canada), New Hampshire (Canada), Arizona (Mexico), California (Mexico), New Mexico (Mexico), and Texas (Mexico).
The United States is not a continent because it is only a portion of a big land, where Canada and Mexico inhabit the same land mass. Australia is a continent because it is its own place, and it owns the entire land mass. Since the United States does not own the entire land mass it is situated on, where Canada and Mexico inhabit the land mass, also, the United States is not a continent. The United States is only a country.
The southern states, as grabbing all that land from Mexico would surely increase slave territories.
Mexico or Canada are the United State's two main land borders.
Mexico lost large amounts of land to the United States through the Treaty of Guadalupe Hidalgo in 1848, which followed the Mexican-American War. Mexico ceded territories that now make up present-day states like California, Arizona, New Mexico, and parts of Nevada, Utah, Colorado, and Wyoming to the United States.
The Oregon Country was explored and claimed by various nations in the early 19th century, while Texas declared independence from Mexico in 1836 and became a Republic. The land ceded by Mexico to the United States came after the Mexican-American War, formalized in the Treaty of Guadalupe Hidalgo in 1848. Therefore, the Oregon Country was claimed first, followed by Texas, and then the land ceded by Mexico.