It is only important to have federal financial aid if you need it. If you have the money to pay for college, then go ahead and use it. If you are in need of assistance, then applying for and receiving aid would be very helpful.
The federal financial aid is open to everyone that has a social security number and is a legal resident. Most financial aid is used for college students that need help paying for college.
You need to fill out forms for financial aid and see if what you make for income and other things like the number of children you have will qualify you for that aid. A lot of people do not qualify...
No, military members are not allowed to file for federal financial aid because the military already provides tuition assistance up to and including 100% tuition coverage.