How old is Wolverine? Wasn't he in the civil war or something? It seems like movies keep showing flashbacks of earlier and earlier events.
No one knows exactly for sure. In the comics story Origin, James Howlett is born sometime between 1886 and 1897. There is no record of Wolverine fighting in the American Civil War in the Earth-616 universe.
In the movies, however, James Howlett was born earlier within the same century. X-Men Origins: Wolverine shows James and Victor fighting in multiple wars across time, including the American Civil War.