The Swedish Air Force was created on July 1, 1926 when the aircraft units of the Army and Navy were merged. Because of the escalating international tension during the 1930s the Air Force was reorganized and expanded from four to seven squadrons. When World War II broke out in 1939 further expansion was initiated and this substantial expansion was not finished until the end of the war. Although Sweden never entered the war, a large air force was considered necessary to ward off the threat of invasion and to resist pressure through military threats from the great powers. By 1945 the Swedish Air Force had over 800 combat-ready aircraft, including 15 fighter divisions.
A major problem for the Swedish Air Force during World War Two was the lack of fuel. Sweden was surrounded by countries at war and could not rely on imported oil. Instead domestic oil shales were heated to produce the needed petrol.
This was the insignia painted on aircraft from the beginning to modern day.