Piechota wybraniecka

Piechota wybraniecka (Polish pronunciation: [pjɛˈxɔta vɨbraˈɲɛt͡ska], chosen infantry) also known as piechota łanowa (łan's infantry) was a type of an infantry formation in the Polish–Lithuanian Commonwealth. Formed in 1578. Consisted of "royal" peasants (one from every 20 łans) from not charged (not under frequent lien, etc.) and revendicated royal lands.

Difficulties in recruitment:

Eventually the formation was totally discontinued (late 17th / early 18th century) in exchange of tax for the army.