From here, you can send out your troops to explore new land. This is an easy way to expand your
Kingdom as it is risk-free for your troops - though, of course they won't be able to defend you whilst
they are away.
The more troops you send, the more land they will find. However, as your Kingdom gets larger, you
will need more troops and time to find ever smaller amounts of new land until it becomes uneconomic
to explore any more.