Armstrongism maintains a pacifist position and prohibits members from military service. Believers are called to be separate from the world, and participation in warfare is seen as incompatible with Christian discipleship. Members are expected to register as conscientious objectors and to refuse military conscription. This stance is based on a broader interpretation of separation from worldly governments and systems.

While the Old Testament depicts God commanding Israel to wage war, Armstrongism teaches that such warfare was specific to national Israel and does not apply to the New Testament church. Christians today are citizens of God's kingdom, not earthly kingdoms, and should not participate in their military structures. This pacifism extends to refusing to bear arms or support military causes, distinguishing Armstrongism from mainstream evangelical Protestantism.