By 1627 his reputation was such that he became one of four Scottish colonels knighted that year by Gustav II Adolf, the others being Patrick Ruthven, Alexander Leslie and David Drummond. In June 1630 Hepburn accompanied the Swedish king to Pomerania when the king initiated his German campaigns against the Habsburg Empire. Hepburn jointly commanded with Colonel Maximillian Teuffel at Colberg, which capitulated to Swedish forces in 1630.
By 1627 his fame was so great that he became one of four Scottish colonels knighted that year by Gustav II Adolf, the others being Patrick Ruthven, Alexander Leslie and David Drummond. In June 1630 Hepburn accompanied the Swedish king to Pomerania when the king initiated his German campaigns against the Habsburg Empire. Hepburn jointly led with Colonel Maximillian Teuffel at Colberg, which surrendered to Swedish forces in 1630.