 Through the Defence Act of 1936, the air defense took on a more independent role in the artillery, which resulted in, among other things, a number of anti-aircraft divisions being organized.The Östgöta Anti-Aircraft Regiment was one of the regiments that during the years 1939-1942 came to be the foundation for a number of air defense units.From 1939 to 1941, a detachment from the regiment was placed in Stockholm, which was called the Östgöta Anti-Aircraft Regiment's Detachment in Stockholm (A 10 S).