I didn't realize their movements when fighting them, but it's really cool how they work themselves into a fighting formation at the start of that. A squad runs forward, drawing fire and counterattacking, the shield squad behind that covers the men behind them while they flank to the sides then it all turns into chaos for a bit. That, or the computer made a happy coincident that looked pretty cool. Now watch it again at a higher speed, it looks crazy (1.75 is the butter zone) And, damn, Horizon's soldiers throw some crazy melees.