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A defense in depth is intended to protect you until you leave; then when they move forward, it offers them no cover. The intent is to bleed the attackers numbers to a non viable amount. Done right, few defenders can stop large groups of attackers. You simply use these prepared positions to trim 5 to 10 attackers at each location. The Man who taught me this, used his house as the last prepared position. He just works it from the outside, with a sniper rifle. He planned for a hundred attackers, with only himself to oppose them. He figured a couple of days to kill enough to get them to leave. His supplies are distributed, and collect abandoned gear as payment. He said he would likely come out ahead, and he intends to stack the bodies past the first defensive position in preparation for another incursion....

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