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The Battle of Locus Castorum took place during the Year of the Four Emperors between the armies of the rival Roman Emperors Otho and Vitellius. Locus Castorum was a village that existed in the 1st century Roman Empire roughly 15 kilometers from Cremona. It was also referred to as "the Castors" and "at Castor's." The village may have been the location of a temple to the Gemini twins, Castor and Pollux.