If there are any special forces behind the lines raising hell, these are Ukrainian special forces. They have both the will and capacity. However, the geography is so vast that it’s not just Ukraine’s forces. Look at a map, of all the places that had strange happenings. One is an air force base, north of China in the eastern territories? I’ll grant you, it could be fire rescue training on that one.
However, the geography of all these fires is vast. Near the border, sure.
Moreover, the foreign legion is at 20,000 troops, or slightly higher, not 100,000, and since they were issued military cards, were offered citizenship, and wear Ukraine’s military uniforms, they are covered under the Geneva Convention. The Wagner / liga troops are Private Military Contractors, (PCM) and are mercenaries under the Geneva Convention.