95% of the Polish casualties in that region were LOW troops. Organization The units of LOW included: Wejherowo Independent Detachment (Odział Wydzielony Wejherowo; west of Wejherowo) under Lt. Col. Kazimierz Pruszkowski 1st Marine Rifles Regiment Puck National Defence Battalion Redłowo Independent Detachment (Odział Wydzielony Redłowo; south of Gdynia) under Lt. Col. Ignacy Szpunar 2nd Marine Rifles Regiment 1st Reserve Infantry Battalion Kartuzy Independent Detachment (Odział Wydzielony Kartuzy) under Captain Marian Mordawski Gdynia II National Defence Battalion Kartuzy National Defence Battalion Gdynia I National Defence Battalion (near Koleczkowo) 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). Anti-air defence was provided by the 1st and 2nd battalion of AA artillery, with 14 75 mm guns wz.22/24 and 14 40 mm wz. 38 guns. Altogether, the forces subordinate to Col. Dąbek numbered ca. 15,000. Quote Polish soldiers fought gallantly, and they did not spare blood. The area of Gdynia and Danzig was defended by the elite of the Polish armed forces. Those [sic] were young and inspired units of the navy and army, which fought admirably. On the plateau of Oxhöft we found trenches filled with dead Polish soldiers, who fell by [the] hundreds where they fought, with rifles still in their hands. It was apparent, that they fought to the bitter end. from F. O. Busch, Unsere Kriegsmarine im Polnischen Feldzug See also Coastal artillery References Grupa Obrony Wybrzeża Military units and formations of Poland in World War II Invasion of Poland