I'd like to tip map founders about WW2 Battle of Narvik from 9th of April to 8th of June 1940. The nazis were defeated by British, French, Polish and Norwegian troops. This was the nazis first defeat in WW2. Later British and French troops retreated to defend France. The nazis took Narvik.
Narvik provided an ice-free harbour in the North Atlantic for iron ore transported by the railway from Kiruna in Sweden. Both sides in the war had an interest in securing this iron supply for themselves and denying it to the enemy, setting the stage for one of the biggest battles since the Invasion of Poland