The ranseur is a medieval polearm (also known as the rancoon and the rawcon). It consists of a staff of about 7 feet in length with a long double edged spearhead with two long diagonal flukes at the base, the flukes are nearly as long as the center spearhead. The flukes are designed to have a higher chance of piercing armor, or to disarm an opponent.
The ranseur is related to the partisan, but is a little more uncommon. It is used most often in a formation of troops. As its length makes it a little unwieldy in open combats. These were usually wielded by soldiers of non-noble birth as an anti-cavalry and all around defensive weapon.