You might also consider Ancestry.com. Because today is Memorial Day they have a free search military records for at least today.
Here is one record from Ancestry.com. They have 22 Military Recods on him. Although there appears to be at least one record on someone else also name Sam Bondhus. , wrong birth date. This is the earliest I could find.
NAME: Sam T Bondhus BIRTH: abt 1867 - Norway MILITARY: 12 Jun 1893
Sam T Bondhus in the U.S. Army, Register of Enlistments, 1798-1914 Name: Sam T Bondhus Birthyear: abt 1867 Birthplace: Norway Enlistment Age: 26 5/12
If you are able to use the Ancestry.com site free today you can look at a lot of military records for him, and look at the original documents.
Salmund bapt. Salomon Torkelsen Bondhus born August 29. 1870. Parents; Cottager Torkel Nilsen and Guro Salmundsdatter/ Salomonsdatter, see conf.rec.Oct. 25. 1885, down page #8