Perhaps you should try some spelling variations:
forms volunteer » form volunteer, words volunteer, forming volunteer
his retirement » _ retirement
its regiment » 9th regiment, das regiment, ist regiment
his regiment » first regiment, _ regiment, a 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 forms volunteer ((its regiment) OR (((his regiment) OR (his retirement)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "7th new forms volunteer ((its regiment) or (((his regiment) OR (his retirement))))".
• Adding a wildcard symbol may retrieve word variants: 7th new forms volunteer ((its regiment) or (((his regiment) OR (his retirement))))*.