One thing I enjoy about Total War, is that by electing the RTS option, sometimes I can defeat the opposing side, even when the calculated odds are not in my favor and sometimes I can't, no matter how many times I choose to retry the battle (which the game allows). So sometimes I see the odds are against me and I try to fight it out and win against the odds, sometimes I try to fight it out once and lose and accept the loss and sometimes I try to fight several times, lose and then finally accept the loss. Sometimes I even replay a fight where I won, just because I think that I could win more decisively. However, most fights, I just let the computer auto resolve, win or lose, because I don't feel like doing a whole RTS battle for every single fight.