Simple past tense and past participle of countermarch.(verb)
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Use "countermarched" in a sentence
"Gunpowder complicated things further, so from the sixteenth century on, troops slapped wood and iron and marched and countermarched to the choreography of drillmasters."
"The company quickly saddled up and countermarched in the direction of the Indians."
"The Indians now fell back to a high ridge, on the crest of which they marched and countermarched, threatening to charge down its face."