Independent Operational Group Silesia

Independent Operational Group Silesia (Polish: Samodzielna Grupa Operacyjna Śląsk, SGO Śląsk) was an Operational Group of the Polish Army, created in September 1938 to annex Trans-Olza (Zaolzie) from Czechoslovakia. == History == The Group was commanded by General Władysław Bortnowski and comprised several Army units and five air squadrons.