TAPACHULA (Mexico) -- Several thousand migrants began walking in the rain in southern Mexico Monday morning, tired of waiting for their situation to improve in a region that has little work, and far from reaching their ultimate goal of reaching America.

Their advocates stated that they wanted to draw attention to their situation, timing it with the Summit of the America's in Los Angeles. It could include between 4,000 and 5,000 migrants, mostly from Central America.

This is the largest caravan of migrants to try to flee southern Mexico in this year's. Mexican authorities eventually disbanded the other caravans using a combination of force and offers to resolve cases more quickly.

Migrants and asylum seekers complain that Mexico's strategy to contain them in the south has made their lives difficult for months. Many migrants are in debt for their migration, and there is not much work available in Mexico's southern region.

The influx of asylum seekers has caused Mexico's asylum agency to be overwhelmed. Because of Mexico's restrictive policies, asylum applications in Mexico are one of the few options for migrants to legalize their status to allow them to travel north.