Adventurer Guild

The Adventurer Guild is an international organization that manages adventurers over this world's human kingdoms.

History
The adventurer guild was an international organization established by consignment of each kingdom. The original goal of the establishment was to force those unfit for work within regular society into the short-staffed national defense, putting them indirectly under the management of the respective kingdoms and making them do manual labor effectively.

However, the international organization was in name only. While the organization headquarters formally did exist, its management was conducted by independent branches within each kingdom. The reason for this was each kingdom needed to dispatch their own official to supervise the branch operations, which made it impossible to cross national barriers.

Furthermore, becoming an adventurer required registration at either the branch office or main headquarters, each with their own advantages and disadvantages. For example, joining a branch office meant restrictions against working under other branches (in this regard, joining the headquarters meant ability to move freely between branches).

Power
Adventurers were jack-of-all-trades that belonged to organizations called adventurer guilds, usually specializing in dirty work. They’d act as mercenaries during wars and exterminate monsters and other dangerous beasts during times of peace.