In the medieval history of Kievan Rus' and Early Poland, a druzhina, drużyna, or družyna (Slovak and Czech: družina; Polish: drużyna; Russian: дружина, romanized: druzhina; Ukrainian: дружи́на, druzhýna literally a "fellowship") was a retinue in service of a Slavic chieftain, also called knyaz.
The name is derived from the Slavic word drug (друг) with the meaning of "companion, friend".
[1][2] Ibrahim ibn Yaqub, who traveled in 961–62 in Central Europe, mentions that the drużyna of Duke Mieszko I of Poland had 3000 men, paid by the duke.
[3] Unlike his predecessors, Casimir I the Restorer promoted landed gentry over the drużyna as his base of power.
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