Post-war Mexico prospered, with war reparations as well as US capital flowing into the country alongside annexation of Guatemala and Belize. They are one of America's greatest allies in the Americas. Their GDP is roughly 76% that of the United States, with a population of 120 million and a well-equipped and trained army. Recently, there has been a treaty between the 2 nations that will enure cross border co-operation in ending illegal immigration. They are also one of the few countries in the Americas to have the atomic bomb.