Rubuta ci gaba don wannan sakin layi - Ivan the Terrible ne ya kirkiro rukunin farko na streltsy a wani lokaci tsakanin 1545 da 1550 kuma suna dauke da makamai masu linzami. A lokacin mulkinsa, Rasha ta yi yaƙe-yaƙe kusan ba tare da tsayawa ba, gami da Yaƙin Livonian a Arewa da yaƙe-yaƙe da Khanates a Kudu. Da farko sun ga yaki a Siege na Kazan
a shekara ta 1552. Da farko, an dauki streltsy daga cikin 'yan kasuwa' yanci da kuma daga ƙauyuka. Daga baya, aikin soja a cikin wannan rukunin ya zama na rayuwa kuma na gado. Don haka, yayin da a farkon karni na 16 sun kasance fitattun sojoji, tasirin su ya ragu saboda rashin horo da rashin zabi a cikin daukar ma'aikata.