Swedlund was commissioned as an officer with the rank of second lieutenant in 1919 and was assigned to
Hälsinge Regiment (I 14). Swedlund became captain in the
General Staff Corps in 1933 and conducted rehearsals and was a teacher at the
Royal Swedish Army Staff College from 1934 to 1938 and from 1940 to 1942. He was promoted to major in 1940 and lieutenant colonel in 1942. Swedlund was head of department at the
Defence Staff in 1942 and was appointed vice chief and section chief in the Defense Staff in 1944. He was promoted to colonel the same year. During
World War II Swedlund was involved in the
Swedish training of Norwegian police troops. Swedlund was then commanding officer of
Norrbotten Regiment (I 19) from 1946 to 1947 and the
Chief of the Defence Staff from 1947 to 1951. He was promoted to major general in 1948, lieutenant general in 1951 and finally general in 1951. Swedlund was the Supreme Commander from 1951 to 1961. ==Personal life==