The Zapatista Resistance was a rebellion against the Mexican government that operated out of southern Mexico. The revolutionary found sympathy with mutants and very quickly mutant freedom fighters joined the Zapatista Resistance. The milita soon began to enlist the help of mutant soldiers in their fight against the Mexican government. As the rebellion went on, the number of mutants fighting the war outnumbered humans. Hence, the Mutant Wall was erected by the US Government.