this came up while talking to a friend today, thought it might have a wider interest

p. 40 of "Chosen to Be a Soldier" (Orders and Regulations), under "Courtship" says:
"A Salvationist will choose a Christian believer for a marriage partner. This is in keeping with the scriptural injunction.... The sharing of religious convictions is very important in the intimacy of home-life.... The ideal situation, of course, is when both partners are Salvationists."

http://marriagepartner.com/dating/55890.php

http://www.boundless.org/2000/regulars/office_hours/a0000290.html

2CO 6:14 Do not be yoked together with unbelievers. For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness? 15 What harmony is there between Christ and Belial? What does a believer have in common with an unbeliever?