You mean illegal immigrants? Most of them cross the border with the help of coyotes: professional smugglers who transport the immigrants on vans, trucks and other vehicles, usually in precarious conditions.
When Mexico won its independence from Spain in 1821, all the territories it possessed included Mexico, most of Central America (Belize, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama) as well as today's US States of California, Nevada, Utah, Texas and parts of Colorado, Arizona, New Mexico, 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.
By Plane By Plane walk 4 miles straight the cross the bridge then cross the river watch for green cars
trains, buses, bikes, walking and planes, etc
Their feet or car.
The arrival of the Europeans did not affect the native americans in Mexico.
Southwesterners from Mexico are known as Mexican-Americans.
with drugs
Immigration from Central Americans into Mexico.
No. Mexico is an independent country.
yes but not exactly as Americans, or Mexican Americans
Mexico
They had to go into war with Mexico to get the land.
Because Mexico And Native Americans owned the land before the Americans came around
New Mexico state was held entirely by native Americans in 1864.
Which agreement?
the Mexican Americans were fighting for the border between TX and Mexico