The history of Central American-Mexican-United States (US) relations began with the independence of what was once the Viceroyalty of New Spain. Bilateral Mexican-US and Central American-US relations became the relevant ones, and with this, the triangularity of the relationship was reduced to its earlier historical parameters, where Mexican-Central American relations had little relevance or influence. Meanwhile, the popular and progressive organizations of Mexico saw their prospects for solidarity with the Central American peoples reduced; their monitoring of foreign policy and consequent pressure on the Mexican government also diminished. The economic concentration and political exclusion that had mired Central American society for decades had produced social crisis and armed revolutionary movements. Central American-Mexican and Central American-US bilateral relations would be modified through a US-Mexican-Central American intermediation that, strictly speaking, would no longer be triangular but linear.