vulcan 5 (2017) 42-63 brill.com/vulc Civilian Structures as Military Restrictions The Sudden Transition to Heavy Tanks in Sweden Petter J. Wulff Apeltunet 7, 181 48 Lidingo, Sweden
[email protected] Abstract The military community is a secluded part of society and normally has to act on the conditions offered by its civilian surroundings. When heavy vehicles were developed for war, the civilian infrastructure presented a potential restriction to vehicular mobil- ity. In Sweden, bridges were seen as a critical component of this infrastructure. It took two decades and the experiences of a second world war for the country to come to terms with this restriction. This article addresses the question as to why Swedish tanks suddenly became much heavier in the early 1940s. The country’s bridges play a key role in what happened, and the article explains how. It is a story about how a military deci- sion came to be outdated long before it was upgraded. Keywords tanks – infrastructure – transition In the 1920s and 30s, Sweden produced and imported various forms of armored vehicles—primarily so-called ‘tanks’—which had been spectacularly intro- duced in The Great War. In the case of tank technology, however, a sudden shift occurred in the early 1940s. Within a year Swedish tank weights doubled and never returned to earlier levels. Such a drastic shift is not a normal part of technological development, or at least cannot be explained by any sudden change in tank technology itself. The sudden deviation from a more gradual development path calls for an answer as to what made the shift occur.