As a family member of a deceased Veteran (If your grandfather has passed on), you can request a Copy of his DD-214 (Discharge papers) which will list his assignments during his service along with his awards and other data.If he is still living, he must do this himself.There was a major fire at the national Military records center in St. Louis in 1973. 17u201318 million military personnel files were destroyed. Most from the World War 2 era and up into the 1960s.But thankfully for you, these were not Naval personnel records, Only Army and Air Force records were affected.ArmyPersonnel discharged November 1, 1912 to January 1, 196080% destroyedAir ForcePersonnel discharged September 25, 1947 to January 1, 1964(with names alphabetically after Hubbard, James E.)75% DestroyedYou can find out what can be gotten and how to get it, here:Request Your Military Service Records