The German–Polish War that takes place from 1002 to 1018 consists of a series of struggles between the Ottonian Henry II (first as King of Germany and then Holy Roman Emperor) and the Polish Piast ruler Boleslaw Chrobry.

The locus of conflict is the control of Lusatia, Upper Lusatia, as well as Bohemia, Moravia and Slovakia.

The fighting ends with the Peace of Bautzen in 1018, which leaves Lusatia and Upper Lusatia with Poland, but Bohemia becaomes a duchy in the Holy Roman Empire.