Simple past tense and past participle of crusade.(verb)
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Use "crusaded" in a sentence
"If the Western imperial church hadn't burned heretics and crusaded against Christians who objected to the Crusades, we'd have a lot more who aren't obsessed with the crucifixion."
"In 2003, as a state assemblywoman, she crusaded against Proposition 54, which would bar government from collecting racial data."
"One was East Harlem's Rep. Vito Marcantonio, a Depression-era communist in all but party card, who crusaded for the poor of all colors."