I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
First of all, from one veteran to another, thank you for your service to our country!
To be eligible to apply for social security disability, you have to show not only that you have earned the required 40 units of social security credit, but also that you have worked and paid into social security for the past 5 of 10 years. Because you have not paid into social security in going on 9 years, you would not qualify for SSDI.
You do qualify though for traditional social security retirement benefits presuming you have the 40 quarter credits earned during your lifetime.
You can apply online for your Social Security Retirement Benefit or (if you are married) a Spouse Benefit at this site: http://www.ssa.gov/retirement/about.htm
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
Please be so kind as to rate my service to you. That is the only way I am credited for assisting you.
I wish you and yours the best in 2016,