Do you know where your father was born?Do you know the name of your father's father?You should be able to find your grandfather on the censuses of 1920 and 1930 with his parents if he was old enough to be in WW II. The censuses are available on microfilm and through some of the paid sites.
Do you have a source to prove the WW II story?You can probably get pension or other record of service.
Do you know the names of your father's brothers and sisters or his aunts and uncles?People often named children for relatives.
These are some of the DAINS of Athens Co., OH:
Samuel, d. 15 Feb. 1913, 991:6768
Lloyd, d. 20 Apr. 1916, 1910:22696
Asa, d. 26 Aug. 1914, Col. 1426.
FamilySearch (free online site), database of the census of 1880, Lodi, Athens, OH:
DAINS, Lewis, 60, OH VT OH; wf. Nancy, 60; granddau. Emetta J., 14.
DAINS, Myron, 28, OH OH OH; wf. Maggie, 30; ch. Cora, 8; Enola, 6; & Augusta, 1.
DAINS, Asa, 53, OH OH OH; wf. Sarah, 51; ch. Wm. W., 30; Samuel, 21; Mary J., 19; Amanda, 12.
Dover, Athens, OH:DAINS, Ebenezer, 60, OH NJ VA; Catharine, 56; ch. Wm. E., 25; Lydia, 21; Thomas J., 17; Jane, 11; granddau. Cora BROWN, 13.
Rick Moran has information about the family of Lewis DAINS & Nancy SARGENT.Myron's dau. Cora, (10 Apr. 1872 - 12 Jan. 1940) m. Jas. Sylvester WITHERS & li. Waterloo Twp., Athens Co.
The DAINS name is the same as DEAN, DANE, etc., going back to Abraham who was of Casco, ME, before moving to New London, NL, CT, by 1671.
Please do not use all capital letters.That is called shouting on the Internet.The use of all capital letters in genealogy is reserved for the surname, to avoid confusion when a person has a first and middle name or there is a list.Also, it's best to spell out the name of the month, or abbreviate.Don't use two numerals.I see that you have put the date of the month first and then the month, but when there are two numerals, it is sometimes confusing.