I recently binged several years worth of posts on the
WWIII 1987 blog/narrative. That author's take on Sweden entering the war is a hastily- and secretly-negotiated limited alliance with NATO. The factors pushing Sweden out of neutrality are a Pact seizure of nearby Bornholm, the possibility of the Pact taking down Denmark or Norway, and various Soviet provocations directed toward gauging Swedish defense force reactions and intimidating Sweden into staying neutral (critical failure on Persuasion). He also has Spetznaz hitting radar facilities on Gotland in advance of air strikes against ADA and antiship missile sites there.
- C.