When roused by battle, the gigantic tauren chieftains employ enormous halberds that are capable of tearing through solid trees with one mighty swipe.
The weapons are not limited only to chieftains as Kaw the Mammoth Destroyer had one.
In the RPG
This section contains information from the Warcraft RPG which is considered non-canon.
Tauren use the axe head and spear-like spike of this traditional weapon to devastating effect. Wise opponents keep their distance from anybody strong enough and furious enough to carry this gigantic halberd. The hook on the back of the halberd can be used to make trip attacks.
Spiritwalkers can use tauren halberds and tauren totems.