Oh yes. Most definately. Look at the halfswording in Talhoffer's 1467 Ed. Then compare it to the poleaxe/pollaxe/pollhammer-plates from that same fechtbuch. Same movement patterns, same principles.
Yeah, pole weapons were used just like half sword. As a matter of fact, I take the bit from Le Jeu de la Hache:
And for this to be done, one must arm the body with good corporeal and material armour, and provide oneself with suitable weapons, like the axe, light lance, dagger, great sword and small sword, to defend oneself and resist one's corporeal and mortal enemies. And for this, let every man, noble of body and courage, naturally desire to exercise and make himself dexterous in virtuous and honourable occupation, and principally in the noble feat of arms, that is to say in Axe-play, from which proceed and depend several weapons above-named.
To mean that halfswording
is axeplay. And if you can fight with a dagger that is 14-16 inches as leverage, and you see it done in Fiore like you said..., an 18-24 inch mace shouldn't be a problem.
But I would still like to see one used like that in a plate somewhere. <img src="/forum/images/icons/smile.gif" alt="" />
Would such a stick be a sort of secondary weapon a knight would resort to if things got ups close and personal? (I am assuming that we are talking about combat between two fully-armoured (in plate) combatants...)
I suspect that the stick was shown as a training tool, not something you would intend to actually fight with. But, put a weighted end on it, and that stick turns into one of the maces you are asking about.
"A sword never kills anybody; it is a tool in the killer's hand." Lucius Annaeus Seneca 4BC-65AD.