Armies Too "Fragile?"

[NimitsTexan]

I have been noticing that, in proably 9 out of 10 battles (talking field battles, not sieges) the enemy army is completely destroyed on the strategic map (though not, necessarily, on the battle map). Even though they have units "successfully" rout of the field with still alive, and the after battle screen will show a couple of hundred men left, the stack dies. I have also noticed, in many cases, where my units routed after severe casualties, they dissappear as if destroyed. In one specific exampe against the Prussians, after the infantry and calvary routed, the Prussian general (who was still alive) decided to withdraw his artillery. But on the campaign map, the "stack" dies and the surviving artilllery, as well as the rest of the units that routed off, are gone. It is almost as if, instead of recovering wounded, troops in badly damaged units are just being automatically written off . . .