Once upon a time..
In a middle age, 2 kingdoms fighting each other.
And you, as a wandering trader, taking this opportunity to sell your items.
But hold on, your items have a huge impact to the situation!
But you don't want to get exposed from making trading.
So, your best choice is to not let either of kingdom fall down to ruins.

Trade, get money as much as possible, and don't let either of kingdoms fall down!