Equipped with caterpillar treads or tracks, like military vehicles; moving on continuous belts instead of wheels.
From 'caterpillar' (the insect whose segmented body resembled the tracked vehicles) plus '-ed', describing vehicles with caterpillar tracks.
Tank designers literally named the tracked system after caterpillars because they watched how caterpillars move—that perfect segmented motion—and copied it for military vehicles, turning nature observation into warfare innovation!
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