Is there any simple way to make people not lead battles when they are not in your council? Because i often find me or my heir leading a battle when i cant die now because it would make everything collapse, or my heir is really good and/or is my only child. And then they lead a battle, if i then choose another character for the flank they are leading, they for some reason sometimes just start leading a subunit of that flank, or a different flank.
I have also tried assigning them to a small splitoff army sitting and waiting in a safe place, but even that doesnt work, because for some reason they just travel back and start leading the army again right when a battle starts.
This caused me to become maimed and die at the "young" age of 54, and sometimes even younger. When i know i could have done a lot with that character still.
And i really dont wish to have the heir to Brittany/Hungary who i managed to matri-marry when he was 4th in line to die because of this.