Milo ÖN was created in 1966 along with five other military districts as part of a reorganisation of the administrative divisions of the Swedish Armed Forces. It can be seen as the successor of VI Military District (VI. militärområdet) created in 1942, but that did not have the same tasks as Milo ÖN. The military district consisted of the land covered by the above-mentioned counties. In 1993, the number of military districts of Sweden was decreased to three, and as a consequence of that, Milo ÖN was merged with the Lower Norrland Military District (Milo NN) to create a new military district, the Northern Military District (Milo N).
Units 1989
In peacetime the Upper Norrland Military District consisted of the following units, which were training recruits for wartime units:
Upper Norrland Military District (Milo ÖN), in Boden
AF 1 - Norrbotten Army Aviation Battalion, at Boden Helicopter Airfield, with Bell 204C and Bell 206A utility helicopters, and one squadron of 10x Bo 105CB3 anti-tank helicopters
F 21/Se ÖN - Norrbotten Wing / Air Defense Sector Upper Norrland, in Luleå
211th Recce Squadron, with SF 37 Viggen photo reconnaissance aircraft and SH 37 Viggen maritime reconnaissance/strike aircraft
212th Fighter Squadron, with JA 37 Viggen fighter aircraft
213th Fighter Squadron, with JA 37 Viggen fighter aircraft
In wartime the Upper Norrland Military District would have activated the following major land units, as well as a host of smaller units:
15th Division, in Boden
NB 19 - Norrbotten Brigade, a Type 85 Norrland Brigade (optimized for arctic/winter warfare) based on the I 19/P 5 - Norrbotten Regiment
NB 50 - Lapland Brigade, a Type 85 Norrland Brigade based on the I 20 - Västerbotten Regiment
8x Norrland Jäger battalions
3x Self-propelled Artillery Battalions, with 8x Bandkanon 1 each
Heraldry and traditions
Coat of arms
The coat of arms of the Upper Norrland Military District Staff 1983–1993. Blazon: "Azur, an erect sword with the district letter (ÖN - Upper Norrland) surrounded by an open chaplet of oak leaves, all or."[1]