Marcy,
I can't find any kind of military record for Reinhard B. Walland, which leads me to believe that he was killed early in the war. I say that because a large number of Osage County men formed home guards in 1861, joined the local Enrolled Missouri Militia in 1862, and continued to form and join local military units to defend their homes. During 1861 southerners in nearby Maries County rose up and fought with some of the northern men. I wasn't aware the southerners raided into Osage County, but maybe they did.
I discovered that Walland on 26 March 1860 married Margaret Kratz, and I think she was a widow of John Kratz. The 1860 census showed the young couple livng near the Gasconade River not far from Cooper Hill in east-central Osage County. Reinhard was listed as a coppersmith. I'm not exactly sure what a coppersmith did, but I think he made cooking pots out of cooper. I also discovered that Reinhard's widow, Margaret, remarried again on 28 April 1866, to a Ferdinand Vogel.
I regret not being able to discover anything about Walland's death for you, but I wish you good hunting.
Bruce Nichols