>>96367175
>how would that work in tunnels?
For defensive fighting in tunnels of their own making dwarves could have the advantage of drill discipline that lets them get used to exact dimmensions of the space and how to move there with the weapon. Precise swings that stay clear of colliding with walls by fraction of an inch. Home gound advantage turned into martial art passed down the generations.

Alternatively, tradition of switching between halberd and axe by using same weapon head on different pole lengths. Some weapon heads could be personalized and highly decorated heirlooms. And adventurers living outside of dwarven community can be even more individualist using "unusual" weapons.