In my world we do fight alongside our people during wars, usually against the other nation, so we are trained. I don't think I could climb up or down the mansion, though. Well, not quickly enough to try and use it in a murder. I can't speak for Poland or Ukraine, though, since I don't know them outside of this mansion.

As for choking, would that be fast enough? They would have had to been trying to incapacitate her pretty quickly. I imagine they'd have to know where to strike, too, but that would depend on what they did specifically.