You're taken from something comfortable and familiar to something dangerous and life-threatening. You fall asleep and wake up speaking a language you didn't know existed. People that still fight with swords, lances and bows and have actual against-all-known-science magic want you to lead them against literal madmen coming on starships from another system. Everything you know about Medieval history tells you that something's wrong here because they're just not as good as the knights and men-at-arms you know about were. Not only that, some of them are not happy to see you and your friend. And that's before you find out about the treason being plotted against the ruler of the kingdom that kidnapped you. And why was it you and not some bad-ass hero or heroine that was taken from Earth for this? You're not heroes and don't want to be.
Sun Tzu called it Death Ground. And you and your friend are standing on it. What can you do?
If you're Adam Sterling and William Sparrow, you do what Sun Tzu says to do.