 Birger Eriksen

Birger Kristian Eriksen (17 November 1875 – 16 July 1958) was a Norwegian officer (with the rank of Oberst) who was instrumental in stopping the first wave of "Gruppe 5" of the German invasion force outside Oslo.Eriksen was the commander of Oscarsborg Fortress when Nazi Germany attacked Norway in the early hours of 9 April 1940.