There are some claims that Operation Gladio and associated …

There are some claims that Operation Gladio and associated "stay-behind" networks were linked to acts of terror and political violence in Europe. This arises from the so-called "strategy of tension" — the idea that acts of violence could be used to create an atmosphere of fear and uncertainty that would prevent communist parties from gaining power. This theory suggests that the secret armies were not just defensive measures against potential Soviet invasions, but may have been involved in counteracting domestic political threats as well.