No doubt it would, but I don't think its affects would be as absolutely overt as all that. Perhaps not even noticed by the fighters at all. Unless of course some all powerful semi-immortal god-like creature wades into the field and starts blasting away with fire-laser-clouds or whatever. I guess that could happen too. The likelihood of any battle to alter would be by force of arms rather than magic, first because of counter maging, and second because no mage would willingly expend what is necessary to cause a battle line to collapse in the middle. I think their effects would largely be secondary, like causing the ground to crack and crumble beneath the enemies feet, or the air to start to get hot and stinging their eye's etc. I'm not even denying that a mage could theoretically blow a battleline apart, but doing so would cost him enormously. i.e. my example of a mage exploding.