Finances are stressful in emergency situations, and it doesn't matter what rank you are. From an unexpected death in the family to a broken car courtesy of the deployment curse, financial emergencies happen no matter how well you plan for them.
Fortunately for service members, their spouses, and veterans, there's a little safety net in place for each of the services to help when these things happen, dubbed the "Emergency Relief Fund."
The Army has the Army Emergency Relief, a non-profit that helps soldiers, retirees and families with resources in a pinch. Additionally, AER provides access to interest free loans, grants, and scholarships.
The AER is endorsed and run by the Army.
The National Guard has the National Guard Soldier and Airman Emergency Relief Fund, which provides up to $500 to eligible households. For more information, check out the National Guard's publication on its emergency relief fund.
The Air Force has the Air Force Aid Society, and it provides emergency assistance, education support, and community programs. While the AFAS is a private non-profit, it is "the official charity of the United States Air Force."
Navy / Marine Corps:
The Navy and Marine Corps share a relief fund called the Navy-Marine Corps Relief Society. The NMCRS is a non-profit that, though unaffiliated with the Department of Defense, can be found on nearly all Navy or Marine Corps bases.
The NMCRS is completely funded by donations and on-base thrift stores, and it provides financial assistance and counseling, quick assist loans, education assistance, health education and post-combat support, budget for baby classes, emergency travel, disaster relief, and the on base thrift stores.
American Red Cross:
For service members, family members, and eligible veterans who are not near an installation, there is The American Red Cross. The Red Cross works alongside the above mentioned aid societies to provide assistance.