Justin's excerpt from Pompeius Trogus tells us that Darius sent an embassy to Carthage with the command that the Carthaginians must abstain from human sacrifices and the use of dogs' flesh, burn their corpses instead of burying them; and at the same time he bade them furnish auxiliary troops against the Greeks, whom he intended to attack. The Carthaginians refused the auxiliary troops because they were frequently at war with their neighbours; to the rest of his commands they readily submitted that they might not seem to be obstinate.[304] Both the objects mentioned for the embassy are fictions, though they show an acquaintance with the Arian religion and the views of Darius, but there is no reason to doubt that Darius entered into negotiations with Carthage. Cambyses had already fixed his eye on Carthage, and Darius by the expedition to Barca and Euhesperides, had become the neighbour of the city, the territory of which reached as far to the east as the Great Syrtis. In common opposition to the Greeks the interests of Carthage and Darius were united, for the Greek navy was the rival of the Phenicians and Carthaginians, and the Carthaginians were in conflict with the Greek cities in Sicily. In Justin's account the embassy of Darius came to Carthage at the time when the Carthaginians in Sicily were in conflict with Dorieus. Their struggle to prevent the settlement on Eryx fell between the years 510 and 508 B.C. The expedition against Barca came to an end as we saw in the year 512 B.C. Hence the negotiations between Persia and Carthage must have followed upon this expedition.[305]