Also, who was involved in the doctrine of "peaceful armed neutrality", and how successful was it? In comparison to Swedens' neighbours Norway (who were firmly in the NATO camp) and Finland (who were derided in the west for following the Soviets too closely.)

Bonus points for anyone who can discuss the social history of the Strv 103.

There must be someone on this subreddit who could have knowledge of such a niche subject...