In the event of emergency, it's important to have food supplies that don't need refrigeration and can be prepared with ease.
The most common food supplies are freeze dried food (popular with hikers and hunters), canned food (found in any grocery store), and non-perishable food, which is generally any food that doesn't need refrigeration, and has a shelf life ranging from a few weeks to many months. Military rations are usually last on a persons list of survival foods because of the mediocre taste of most, but they are still very good food items to have on hand.
If your family is without fresh food sources for many months, you will appreciate being able to have a different variety of emergency foods on hand to choose from, even if that includes the occasional military rations (MRE - Meals Read to Eat), as you include them in your diet.
Freeze Dried Food
Non-perishable Food
Canned Food
Military Rations (MRE - Meals Ready to Eat)
REFERENCES:
American Red Cross - Food Supplies
Survival Acres - Over 1700 Emergency Food Items
Mountain House - Food, Meals, and Snacks for Camping and Backpacking
MRE - Meals Ready to Eat