Eventually, people got tired of waiting for their volunteers to arrive. So they created Indenture. This technology, available in the 15th Century at the Castle, speeds up production at the Levy Quarters, Archery Guild, Stable, and Castle by 33%. It's also extremely inexpensive.
Unfortunately, the Polish government was either extremely patient, extremely inefficient, lazy, or just unaware of this kind of recruitment. The Poles cannot research this technology.
Available to: All except Poland
Researched at: Castle
Cost: 150 Food, 150 Florins
Effect: Military Buildings (except Siege Workshop, Assembly/Guild Hall) train units 33% faster