When Mexico won its independence from Spain in 1821, all the territories it possessed included Mexico, most of Central America (Guatemala, El Salvador, Honduras, Nicaragua and Costa Rica) as well as today's US States of California, Nevada, Utah, Texas, Arizona, New Mexico and parts of Colorado, Oklahoma, Kansas and Wyoming.
Due to the extremely low population for such territorial extension (estimated at 12 million during 1824), Mexico relaxed its Immigration policies, thus allowing American settlers to help populate the northern territories. The conditions to settle were simple: 1) to pledge allegiance to Mexico and 2) observe the Mexican Law and customs. In 1830, these laws incorporated the banning of slavery. Due to the fact that many American settlers in such territories were slave owners, they looked for any pretext to break up with Mexico.
Later, Mexican President Antonio Lopez de Santa Anna took measures to transform Mexico from a Federal Republic to a Centralist Republic. This move prompted Yucatan and Texas to secede from Mexico. Santa Anna's government invaded both republics; while Yucatan was regained, Texas was lost. The Texas Revolution ended after the Battle of San Jacinto, but Mexico did not officially recognize the independence of Texas until after the Mexican-American War (1846-1848) as part of the Guadalupe-Hidalgo treaty.
The border is just there, nobody "paid" for it. Mexico sees no need to enforce the border but the US tries to prevent illegal crossings from Mexico, so if you are asking about who pays to enforce immigration laws across the border, then it is 100% the US.
One group known for patrolling the border are the Minuteman Project volunteers. They are concerned about illegal immigration and aim to provide assistance to law enforcement by monitoring the border for any unauthorized crossings. However, it's important to note that their activities are controversial and not officially sanctioned by the government.
The government is building a fence on the border of Mexico and there is an immigration bill, but most of all, they arent really doing anything to control it
US at the time didn't own the land,Mexico wasrebeling, country was about to wage war. They just didn't want the USto interfear they wanted to be like Great Brittian because US and GB had a treaty that pretty much stated that they weren't to interfear with each others nation.
No, it is an open border.
To the US-Mexico border? Northern Mexico is close to the border.
Montana does not border Mexico.
No one worries about the northern border because Canadians don't really come illegally to the U.S., honestly...the highest illegal rate comes from Mexico..so their main focus is the southern border.
The states that border Mexico are California, Arizona, New Mexico and Texas...
Yes, Mexico does border the U.S
None. Mexico's border touches New Mexico's state limit (and US border).They share a common border.
When the US closed its border after the Immigration Restriction Act of 1921. Before that, many people from Mexico used to work in the United States and returned back to their homes in Mexico. This Act effectively started the illegal immigration problem, as many people had to furtively look for jobs at the risk of being deported back to Mexico. See related questions for further detail.