Hi,Supposedly Navy records were not affected by the fire in 1972.So I would suggest for his military history, you complete the "Standard Form 180".Google that and you should find the form.
Also, since he had a military burialif you can get his Naval Serial number before you send in the forms.That would make it much faster to get the paperwork.And...if he has a sibling still living, have them sign it.But if you are the nearest surviving relative, you may have to be persistent to get the data as you are not a "direct" relative but a descendant.
Also, where he ended up living after the war, contact the county clerk where he live and see if he registered his discharge.And also contact the State Archives for the same state.Hopefully one of them will have the info.
If he was a member of a VFW, they may be able to help as well.
And contact the Sexton of the cemetery where he is buried.They should have some military info on him as well.
FAGAN, ROBERT F SR SC1CUS NAVY WORLD WAR II DATE OF BIRTH: 10/26/1921 DATE OF DEATH: 10/28/1999 BURIED AT: SECTION IROW FSITE 22 DELAWARE VETERANS MEMORIAL CEMETERY 2465 CHESAPEAKE ROAD BEAR, DE 19701 (302) 834-8046