Simple past tense and past participle of troop.(verb)
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Use "trooped" in a sentence
"And Michael followed at the heels of his latest and most terrible master, the twain leading the procession of employees and visiting professional animal men who trooped along behind."
"At their heels trooped the children of the village and all the village dogs, whooping and yelping with excitement."
"Later, large hospitality groups from outside such as Indian Hotels, the Lalit, the Park and Zuri trooped in."