During the Hundred Years War, King Edward III of England waged a war against France. However, there was a problem for fighting such a lengthy war. Every soldier could only serve forty days at a time, which made a traditional army useless. To solve this problem, Edward III would routinely hire entire armies of professional mercenaries. In my fantasy book, I realized that my main characters would not be able to conquer an entire continent with a regular army and would need to adopt Edward III’s system of hiring mercenaries. In order to accomplish this goal, they would need to acquire a great deal of wealth, which will be one of the many challenges they will face along the way.