The Mexico–United States border extends 3,145 kilometers (1,954 miles), in addition to the maritime boundaries of 29 km (18 mi) into the Pacific Ocean … 展开

The border separating Mexico and the U.S. is the most frequently crossed international boundary in the world, with approximately 350 million … 展开

Per the La Paz Agreement, the official "border area" extends 100 km (62 mi) "on either side of the inland and maritime boundaries" from the Gulf of Mexico west into the Pacific Ocean. There is also a 100-mile border zone.
Secure Border Initiative 展开

Mexico is estimated to be the world's third largest producer of opium with poppy cultivation. It also is a major supplier of heroin and the largest foreign supplier of marijuana, 展开

Prior to the Mexican–American War
In the mid-16th century, after the discovery of silver, settlers from various countries and backgrounds began to arrive in the area. This period of … 展开

Background
Data from the U.S. Border Patrol Agency's 2010 annual report shows that among the total number of border crossings without documentation from various countries into the U.S., 90% were from Mexico alone. In addition, there are more … 展开

The Agreement on Cooperation for the Protection and Improvement of the Environment in the Border Area, known as the La Paz Agreement, was signed into law on August 14, 1983, and became enforceable on February 16, 1984. This agreement to protect the … 展开