Mercenary Units

[Deus ret.]

That's the price you have to pay for hiring troops fast.

Often it pays to keep the units somewhere since sooner or later another one of the same kind will show up, enabling you to compensate further losses better. Sarmatian mercenaries for instance are far too valueable to waste, either by disbanding or let alone by using them as quick cannon fodder...

[Dutch_guy]

well you can always merge your merc. units.
not as good as retraining but still..