Depends... if you want to be a marter or not... you could join the Russian side, get a sat phone and run counter intelligence on everything you hear.. all the while pretending to be a Canadian fighting on the Russian side as a propaganda type thing. All the while sabotaging everything in sight when the opportunity arises. You would have to be insanely intelligent to not get caught... but know it’s basically marterdom. Work for the kitchens and sanitary jobs, non combat roles... position the water, food, ect... fein ignorance that you can’t read the labels if you get caught.... I bet if you are lucky you could cause more disruption then a squad of soldiers.