The Goedendag played a major role in the Franco-Flemish war between 1297 and 1305 and thus contributed to the indepence of the county of Flanders (Hi diddly ho neighborinos). Unless the Lucerne or a Pollaxe, it seems to be a more makeshift weapon for a econmically lower class of soldier.
There are many theories about its handling and uses, but one major theory suggest that soldiers with Goedendags were placed in between spear or pike formations and used as dedicated anti cavalvry troops, as their spike-club hybrid was very suitable for ending or at least crippling a horse.
During the Battle of the Golden Spurs in 1302 the G*rmanoid Flemids were able to pin down the French cavalry through their Goedendag troops working in conjunction with pike troops and subsequently wipe them out basically to a single Frogoid Romaboo.
'Goedendag' means 'Good day' in the guttural dialect of the Flemish people. The weapon's name is rumored to derrive from the Bruges Matins massacre of 1302, during which the Flemoids would dish out very life-limiting injuries to anyone greeting back in French or with a French accent.
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