Just an idea of mine - the Dom3 Q&A thread

[Archonsod]

No, it existed in Doms 2. If troops rout of the field, then they end up detatched from the commander (in Doms 2, they'd usually end up in a different province).
With the new leadership stuff in doms 3, you'll probably see this a little more often than your used to (well, unless your Ermor )

[thejeff]

So the difference is routed troops will sometimes wind up in same province? (Assuming the battle is won, of course.)

That's good.

I'll have to double check, though. I'm pretty sure they didn't route off the field.

[Archonsod]

I don't think they need to actually leave the field, it seems to occur as soon as they rout.

[thejeff]

If so, that's new and doesn't really add anything except the hassle of checking for them and reorganizing your army.