Mexican society is becoming militarized due to the increased use of the Mexican military in domestic affairs. This militarization is the result of three factors: the internal focus of the military, the drug war, and corruption. The internal focus of the Mexican military is based on doctrine. Mexico's drug war began in 1986 when U.S. President Reagan convinced their government that the trafficking of drugs constituted a National security threat. Corruption is pervasive in Mexico due to the combination of seven decades of authoritarian rule by the hegemonic Institutional Revolutionary Party (PRI) and the associated effects from transnational drug trafficking. The army represents the last publicly respected institution in Mexico. During the past three years, almost the entire law enforcement apparatus to combat drug trafficking has been replaced with military soldiers and numerous key political appointees and governmental positions have been filled with Mexican generals and colonels. There are few national interests more profoundly consequential to the United States than the political stability and general welfare of Mexico. The militarization and changing civil military relations in Mexico is an important aspect in U.S. Mexico relations and must be considered impossible policy changes.