 Complete the following phrase:  The soldiers recruited mostly from Podolian and Ruthenian szlachta nobility, and while in service were stationed at Kamieniec Podolski Kamianets-Podilskyi, now Ukraine, Trembowla Terebovl and the fortress of Bar. Service in the formation provided the recruits with valuable military experience in a tough environment which made the Obrona potoczna one of the best units of the overall Polish armed forces of the time. In addition to protecting the frontier, Obrona potoczna also took part in regular military engagements, for example in the Polish victory against the Moldovans, at the 