I have completely destroyed the Franks and their horde, except for about 30 men of theirs. It's their faction leader and a quarter of a unit of horde spearmen. I had half a stack chasing them when one turn...BAM! they disapeared. They just vanished. Well, I thought fine, they're gone. Then I realized on the mini-map there was a star where a horde faction is and when I put the curser on it, it said "franks". Well, I've moved my half stack around everywhere to attract an ambush in wait, but nothing. I covered the entire area with about 6 different units mowing the area.

No luck and I need to know what's going on. It's annoying me...