Stanisław Żółkiewski
In 1612 Koniecpolski joined the "wojsko kwarciane" (regular Commonwealth army) in Ukraine under the command of Field Crown Hetman Stanisław Żółkiewski, who greatly influenced his career. In 1614 he was entrusted with destroying rebellious regular units led by Jan Karwacki, and on 17 May, with Stanisław Żółkiewski's son, Jan, he won the Battle of Rohatyn and captured Karwacki. In 1615 he married Żółkiewski's daughter Katarzyna (Catherine). Soon after the wedding, he received the official rank of "podstoli koronny" (Crown Master of the Pantry).