A snapphane was a member of a 17th-century pro-Danish guerrilla organization, auxiliaries or paramilitary troops that fought against the Swedes in the Second Northern and Scanian Wars, primarily in the eastern former Danish provinces that had become southern Sweden in these wars. The term was a derogatory reference for those the Swedish authorities considered illegal combatants.

Snapphanar were of five general categories:

Often these four groups collaborated and contributed to various Danish war operations, and most often, they were controlled from Copenhagen.

These five categories of the fighter were all considered snapphanar by the Swedes, and if caught, were all punished as such. However, these combatants themselves did not use this term, and those in Category 2 and 3 strongly preferred the word friskytter.

A large part of Scania was no-man's land during the Scanian war. The Danes had taken refuge in the two enclaves of Landskrona and Helsingborg and the Swedes in Malmö and later in Kristianstad, but the rest of the territory was stateless and small parties of cavalry would be sent out from the fortified enclaves to stock up, forage and seek out skirmishes with the enemy. This kind of war was called "party warfare" or "petty war" and was typical of early modern Europe when firearms began to make a serious impact and warfare became increasingly expensive and difficult to carry out in the traditional sense. Large field battles usually did not give a definite result but cost huge sums of money. Instead, there was usually a war of attrition between different garrisons that sat in fortified cities such as Kristianstad in Skåne or Kristiansand in Norway. A gloomy consequence of this kind of warfare was that the land around the fortresses was completely destroyed because of scorched earth tactics where both sides burned everything, so that the enemy did not get it.

The easiest plan in such situations was to use agile small troops, usually cavalry, but also infantry. On the continent the Habsburg, Croats were among the most skillful troops and the Danes hired small contingents of Croats to co-operate with the Danish specialists in petty war - the friskytter.

During the Scanian War, many Scanians who lived in the western part of Scania could quite easily join the regular Danish army, after the temporary 1676 Danish re-conquest of the province. But in the North (closer to Sweden), this was more difficult. However, Scanians who joined the army or were drafted were often sent to the friskytte units, like the Copenhagen student Jörgen Wesseltoft who was partly friskytte, partly one of the king's guards. In any case, the partisan movement was the most common way to support the Danish side. The movement did also return during the 1711 Danish attempt to regain Scania.

The term snapphane, which was used as a pejorative term by the Swedes to describe the pro-Danish rebels, was originally a word for gangs of bandits that lived in the woods. When Scanian exiled peasants were organized by the Danish king into bands that fought the Swedes with guerrilla warfare, they were also referred to as snapphane.