Final answer:
The AER annual fund campaign is held army-wide on an annual basis to provide financial support to soldiers and their families.
Step-by-step explanation:
The AER (Army Emergency Relief) annual fund campaign is held army-wide annually. This campaign provides soldiers and their families with financial assistance during times of need. The phrase 'to raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;' refers to how military funding is approached in the United States Constitution, ensuring regular review and appropriation. However, this constitutional reference is about the federal funding provided by Congress and not directly related to the AER's fundraising efforts, which is a private, nonprofit organization assisting members of the Army.