There's a program in the military called the International Military Student Officer (IMSO) program. This program is run by the Defense Security Cooperation Agency, and exists in all branches of the military. But, while this program is run by the military, the Secretary of State is responsible for its "continuous supervision and general direction."
The IMSO program includes military training (particularly the training of foreign military personnel on equipment acquired by their countries from the United States) as well as instruction in such things as foreign policy, civil affairs, and security. Another of its core missions is to "Promote better understanding of the United States, its people, political system, institutions, democratic values, and way of life." To fulfill this mission, the program also includes intensive instruction on American government and culture....
Foreign military students are taught that America is a Christian nation, and that liberals, starting with the liberal justices appointed by F.D.R., have subverted America's so-called judeo-christian heritage, and how the "courts struggle with ... accommodation of atheists demanding religion be kept out of public life."
These are the last three paragraphs of a lengthy essay on American religion in the "American Family Life and Community Life: Religious Institutions" section of the IMSO training: