"Kill! Kill! Kill! Keep hunting them down! Don't stop!"
"Even if you're so tired that you can't catch your breath, don't you ever dare stop! Even if you're so exhausted that you feel like dying, you also have to die of exhaustion along the way!"
"Use our blades and swords to bring a lifetime of peace for our posterity!"
The human soldiers roared and encouraged each other as they dragged their exhausted bodies to pursue the equally exhausted Orcs, who were in front of them.
They were already very tired, but the Orcs in front of them were even more tired—the humans still had clergymen who were following the army about, after all. They could now and then use magic spells to relieve them of fatigue and allow them to restore their strength. The Orcs might also have their clergymen, but they were almost left with no gods who could bestow divinity to them.
This was a war of pursuit, with an outcome that was fated to be.