LOW), commanded by Colonel Stanisław Dąbek (land forces), was an important unit tasked with the defence of Poland's Baltic Sea coast during the 1939 invasion.
LOW was at first subordinate to the Toruń-based military area command led by General Władysław Bortnowski (Armia Pomorze), but was later reassigned from Armia Pomorze to the Polish Navy, and received orders directly from Counter-Admiral Józef Unrug.
LOW was to defend Gdynia and Oksywie; Hel and Westerplatte had their own dedicated formations under the Coastal Defence Group.
After the Germans destroyed most of the Armia Pomorze by 5 September in the Battle of Tuchola Forest, LOW was separated from the majority of Polish forces.
The units of LOW included: The remainder of the Polish forces, including the improvised units, the mobilized Police, Border Guards, Border Defence Corps and some volunteers, were to defend the outskirts of Gdynia and the Oksywie Heights (German Oxhöft).