<P> In 1881, problems arose for Guatemala when President Justo Rufino Barrios claimed lands Soconusco and Chiapas . The initial position of the Government of Mexico was not to accept discussion about their rights in that region . However, from 1882 began talks to resolve the problem between Matías Romero and Justo Rufino at The Winch at Hacienda de Barrios (Soconusco), where both had possessions . They decided to go to arbitration in the United States . </P> <P> The preliminary agreement was signed in New York City on August 12 of 1882, and it stated that: "The Republic of Guatemala dispenses with the argument that has held about his rights to the territory of Chiapas and Soconusco department ." The position of Mexico is well seated in their rights of those territories . The final boundary treaty was signed in Mexico City on September 27 of 1882 . The first article provides that: "The Republic of Guatemala forever renounce rights that judges have on the territory of the State of Chiapas and Soconusco your district, and therefore considers the territory as part of the United Mexican States ." As for the delineation of the border itself, Mexico and Guatemala agreed to use straight lines between key points known and accepted by both countries . The measurement and demarcation work was completed in 1902 . Soconusco in Guatemala advanced to the Suchiate river and Mexico received the county of Motozintla . </P> <P> In 2006, Joseph Contreras profiled the issue of Guatemalan immigrants illegally entering Mexico for Newsweek magazine and pointed out that while Mexican president Vicente Fox demanded that the United States grant legal residency to millions of illegal Mexican immigrants, Mexico had only granted legal status to 15,000 illegal immigrants . Additionally, Contreras found that at coffee farms in the Mexican state Chiapas, "40,000 Guatemalan field hands endure backbreaking jobs and squalid living conditions to earn roughly (US) $3.50 a day" and that some farmers "even deduct the cost of room and board from that amount ." In 2008, the Mexican National Institute of Migration estimated that 400,235 people crossed the border illegally every year and that around 150,000 of them intended to enter the United States . </P> <P> Like the Mexico--United States border, Mexico has limited fencing along its southern border with Guatemala . In July 2014, Mexico adopted the Programa Frontera Sur at the urging of the United States . The plan proposes "to overcome common challenges related to migration and respect for human rights" and to establish "a more modern, efficient, prosperous and secure border ." Instead of building a wall and preventing people from crossing the border, Mexico relies on interior enforcement via layers of checkpoints staffed by the National Migration Institute, the military police, the Mexican Army, and the Mexican Navy . The results of the enforcement program has been mixed with increased detentions and removals but also increased victimization of migrants by criminal gangs and corrupt government officials due to more dispersed flows as migrants use less travelled routes . In 2015, Mexican authorities arrested more than 170,000 Central Americans up from 120,000 in 2014 . In 2016, according to the Mexican civil rights organization Meso - American Migration Movement (Movimiento Migrante Mesoamericano), over 400,000 migrants crossed Mexico's southern border with 20,000 of them dying or disappearing in Mexico due to criminal gangs, trafficking, or exposure to the elements . </P>

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