A joint Franco-Spanish force invaded Mexico in 1862 to collect the debt of the Mexican government. The British and Spanish armies evacuated according to agreements with the government, but Napoleon III of France sent troops to Mexico City where they forced the president to flee. Meanwhile, a civil war is raging in the United States. France has considerable interest in halting U.S. growth and believes that if it conquers Mexico, it could help the Confederates divide the United States into two countries. After persistent pressure from Washington, France withdrew its troops in 1867. The objective of the Commission is to identify and assess current and future health problems affecting the population of the U.S.-Mexico border region, as well as to promote and facilitate measures taken to address these problems. . . .