In the Battle Hostile_encounter of Cedynia or Zehden , an army of Mieszko I of Poland defeated Conquering forces of Hodo or Odo I of Lusatia on 24 June 972 , near the Oder river .

While Mieszko 's differences with Otto I were settled Resolve_problem by an alliance Cause_to_amalgamate and payment Commerce_pay of tribute to the latter , the nobles whom Otto I had invested with the former Saxon Eastern March , most notably Odo I , challenged Mieszko 's gains Earnings_and_losses .

The battle Hostile_encounter was to determine Deciding the possession Control of the area between Mieszko and Odo .