Quote Originally Posted by Captain Fishpants
Don't panic!

Your troops will definitely get tired and then exhausted in battle. They may keep going a little longer if they're winning or feeling particularly enthused, but they are definitely not 'Duracell bunnies'. OK?
I wonder if part of this opinion isnt due to the difficulty in seeing the energy levels of the troops. In STW and MTW it was very easy to see that level and the effect of charging. It may be just me, but I havent noticed any obvious change to indicate energy level during the battles, so it may be a matter of perception.