Murphy's law dictates that if you lose a unit, it's going to be a "best" unit, whether it's your most experienced, the most expensive or simply the one unit you needed to break the line and route your enemy nineteen different direction.
Regardless of how the AI targets, any damage it inflicts is liable to make you want to smash your computer in revenage.
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"Charlie may be dancing the foxtrot, but I'm not going to stand around wearing a dress"