Perhaps you should try some spelling variations:
york volunteer » form volunteer, worker volunteer, mock volunteers
71st regiment » ist regiment, first regiment, 114th regiment
its regiment » his regiment, das regiment, ist regiment
9th regiment » 89th regiment, 29th regiment, 11th regiment

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: 7th new york volunteer ((((its regiment) OR (71st regiment))) OR (9th regiment)).
• Adding a wildcard symbol may retrieve word variants: 7th new york volunteer ((((its regiment) or (71st regiment))) or (9th regiment))*.