@brokenshakles >It's a series of fatal funnels on a military scale.
Sure, but less fatal that trying to get over a mountain.

>Sun Tzu advised moving thru such areas quickly, and not getting caught up in them under any circumstances.
I'm not sure his writings are really all that relevant.

Yes, the whole point was to try to get through those valleys quickly and according to the current reported casualties of 12+ or 28+, it seems to have worked with not terrible losses.