The art or practice of laying out and constructing a military camp, especially the Roman method of designing temporary fortified camps.
From Latin 'castra' (camps) plus 'metari' (to measure), literally meaning 'the measuring out of camps'—a technical term for the skilled engineering of military encampments.
Roman officers spent years learning castrametation because a poorly planned camp could lead to disaster—archaeologists can still read the original layouts because Romans measured camps with such mathematical precision.
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