Svinfylking, or boar-headed deployment, was a type of wedge strategy, which takes its name from the svinfylking warriors, boar-warriors sacred to the Vanir gods, comparable to Berserker and Ulfhednar.
The formation consisted of a group of heavily armed warriors, probably for hand-to-hand combat, and lighter armed archers, grouped in a triangle formation in which the warriors defended the archers placed in the center or in the rear.
A cavalry attacking the svinfylking would be hit by the outside warriors with spears, causing havoc among the horses. Boar's head deployment could also be used as a wedge to break enemy lines.
Numerous svinfylking formations could be flanked forming a zig-zag line to break enemy ranks.
Svinfylking was based on surprise. If the wedge could not immediately break through enemy lines, the Viking warriors would not last long.
Svinfylking, or boar-headed deployment, was a type of wedge strategy, which takes its name from the svinfylking warriors, boar-warriors sacred to the Vanir gods, comparable to Berserker and Ulfhednar. 
