Burning Play by Post

I'm looking for people who know the burning wheel system or who are prepared to learn it themselves. Since it will be play by post it will be much harder for me to teach anyone new how to play it.

The starting situation will be make believe/ alternative Imperial Renaissance Europe. In terms of how much fantasy is involved I'm picturing hints of fantasy at most.
As a seed to begin with:
During a military parade through the town there is a sudden attack from a large group of well armed soldiers hidden in the crowd. The small parade force is taken by surprise, and the commander is publicly executed.
Border tensions between the surrounding duchy's heats up as people begin to point fingers. The town comes under heavy scrutiny as authorities look for any whom aided the foreign soldiers. Talks of war being started is the topic of the region. But who is to blame? So soon after the last conflict? Are people ready?
Most importantly how is your character involved?

This is just some starting thoughts. I'd like to discuss the situation further with the players before we go ahead and set anything in stone.