2-107. The mission of the chaplain is to perform or provide religious support to the unit by assisting the commander in providing for the free exercise of religion and religious, moral, and ethical leadership. Chaplains execute their distinct religious support mission for Soldiers, members of other military services, family members, and authorized civilians in a variety of geographical locations, operational situations, and circumstances. Chaplains provide religious support and advise commanders on the impact of religion, reflecting the dual roles of religious leaders and religious staff advisors. Chaplains and chaplain assistants are assigned at all battalion and higher echelons. The chaplain prepares a portion of Annex F (Sustainment). (See FM 1-05 for more details.)