Since the chaplain ministers to men and women whose work takes them far from home, and since he serves personnel of other faiths, the post is not a religious establishment; it is an affirmation of the basic right of human beings to worship as they choose. U.S. Army Regulation 165-1 set forth this constitutional principle plainly: "In striking a balance between the ‘establishment' and ‘free exercise' clauses, the Army chaplaincy, in providing religious services and ministries to the command, is an instrument of the U.S. government to ensure that soldiers' ‘free exercise' rights are protected