While the Hungarian tribes moved into Hungary, the Cumans still inhabited the vast areas of the Pontic–Caspian steppe, where they had created a powerful nomadic confederacy "(see Cumania)". The 13th-century "Gesta Hungarorum" claims that Cumans were present in the Principality of Hungary ca. 900, describing the Aba tribesmen as Cumans. This account is nevertheless anachronistic, meaning that "Gesta"s "Cuman" is perhaps a stand-in for "Turkic", "Khazar", or "Bulgar". The first verifiable attestations of Cumans in Arpadian Hungary were as raiders, during the 11th century; they later returned as mercenaries backing the Hungarian Kings. Stephen II's retinue included a Cuman contingent led by a Captain Tatar, which became a nuisance to the locals after pillaging the local resources. Possibly Cuman "Saracen" troops assisted Géza II in his 1150s war against the Lombard League.