Meaning

noun (military) a march in the reverse direction or back along the same route

verb march back along the same way

verb change the order of soldiers during a march

originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Proto-Indo-European *-teros Proto-Italic *-teros Proto-Italic *komterosder. Proto-Italic *komterād Latin contrāder. Old French contre- Anglo-Norman countre-bor. Middle English counter- English counter- English march English countermarch From counter- + march.

Etymology from Wiktionary, CC BY-SA 3.0