User blog comment:KevlarNinja/Knight vs. Persian Immortal/@comment-3189283-20110222135809/@comment-422690-20110223215347

The halberd was created mainly for anti-cavalry warfare, while the spear was an anti-infantry weapon. I think the spear would do better in an infantry vs infantry fight, discounting armor. The halberd is less than practical for fighting infantry, due to the extra weight at the head which, by necessity, limits the reach of the weapon if used as a spear since a knight (under all that armor, too) would have to hold the weapon closer to the head due to leverage issues.