The US has just announced another $8 billion tranche of deadly aid to prolong the war in Ukraine. Even though it has long been clear that Ukraine has lost, a section of the western imperialists are determined to fight to the last drop of Ukrainian blood. Meanwhile, Zelensky, for his own political reasons, like a gambler doubling down, has opened a new, bloody front in Kursk.
As insurgents, maybe. I doubt they'd be sending cruise missiles over the border if the US wasn't passing them out.