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Gnaeus Pompeius Longinus (died 105) was a Roman senator and general. He was the 5th legate of Judaea from 85 to 89 and held the suffect consulship in the nundinium of September–October 90 as the colleague of Lucius Albius Pullaienus Pollio. He was deceived into a trap by Decebalus during Trajan's Second Dacian War, and rather than provide an advantage to the Dacian king, killed himself.
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