Perhaps you should try some spelling variations:
york volunteer » form volunteer, worker volunteer, mock volunteers
volunteer iii » volunteer vii, volunteer iv, volunteering iii
iii regiment » his regiment, ist regiment, ii regimento
volunteer a » volunteer _, volunteering a, volunteer army
a regiment » _ regiment, a regime

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 a regiment ) OR ( 7th new york volunteer iii regiment )).
• Adding a wildcard symbol may retrieve word variants: (( 7th new york volunteer a regiment ) or ( 7th new york volunteer iii regiment ))*.