Defense of Katowice
1939 CE.
Shown on the map at 50.264°, 19.024°.
The Defense of Katowice (Polish: Obrona Katowic) was carried out by small groups of irregular Polish militia on 3–4 September 1939 during the German invasion of Poland. German troops secured the city by the end of 4 September.
Text from the Wikipedia article Defense of Katowice, licensed CC BY-SA 4.0.