Recently I found the grave of my third great grandfather. He was born in New York, grew up in Michigan, and fought in the Civil War. After the war he raised his family in Michigan, and then for some reason moved to North Dakota and either his wife stayed behind or moved back to Michigan to live with her daughter. They both claimed the other was dead on the 1900 Census, so I think maybe he ran out on his wife.
Regardless, it was rather surprising to find him buried in North Dakota as my family has no other connections to that state that i am currently aware of.