These are fantastic sculpts and will be joining my mercenary band (along with the fantastic artillery) just as soon as payday rolls around

The Katzbalger, in battle, was used as a close in-fighting weapon secondary to the Landsknechts' main armament, i.e. Pike or arquebus. Particularly when it came to a pike push and the crush of the melee made the pikes useless.
I suspect most of the time the soldiers used them for personal protection and score-settling in the camp, durng a life that was often brutal and short.
It was deliberately modelled on the Gladius and was usually around 18" long
The swords on these marvellous models look a bit bigger to me(?) although clearly not a 'zweihaender' they seem to be carrying shields or bucklers.
The shield bearers in the triumph of Maximilian are carrying swords more like a cross between broadswords and rapiers, and carry slightly smaller bucklers.
You can see it all here:
http://www-classic.uni-graz.at/ubwww/sosa/druckschriften/triumphzug/In my version of this alternative Renaissance universe they will probably be part of a Generalissimo's bodyguard.
CG