Seems like several people are considering joining Trials but aren't sure about the role they want to play in War.
If a Master appoints a General during War 6, can that Master still participate? Does he/she have to fight for the element of which he/she is Master? Is he/she bid upon by other Generals in the auction?
Barely retired and already starting trouble. We have not even finished unpacking all our boxes yet.
The short answers are "No, irrelevant, irrelevant", and the reasons are for the situations you describe. It is undesirable to have a Master participate for a different element, and any rule to prevent that would be unfair as it would eliminate competition on a desirable player.
That being said, I do not want to chase off Masters from participating in War. We are doing what we can to alleviate the tedium of generalship. We want this to be a positive experience for Masters, not a chore.