WOW! was I surprised to find this. Under certain circumstances, special extra earnings for your military service from 1940-through 2001 can be credited to your srecord for social security purposes. These extra earnings may help you qualify for social security or increase the amount of your social security benefit. Special extra earnings are granted for periods of active duty or active duty for training. Special extra earnings are not granted for incactive duty training.
For more information you can go to www.ssa.gov/retire2/military.htm