During the night of September 10, the earlier unit moved from the area of Rzeszów through Pruchnik and Zamiechów to Radymno at the San River.
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The central area of the line around Jarosław (between Radymno and Sieniawa was manned by four battalions of infantry and 20 guns under the command of Lieutenant-Colonel Jan Wójcik of the 2nd Legions' Infantry Division.