The Gauls became better integrated with the Empire with the passage of time. For instance, generals Marcus Antonius Primus and Gnaeus Julius Agricola were both born in Gaul, as were emperors Claudius and Caracalla. Emperor Antoninus Pius also came from a Gaulish family. In the decade following Valerian's capture by the Persians in 260, Postumus established a short-lived Gallic Empire, which included the Iberian Peninsula and Britannia, in addition to Gaul itself. Germanic tribes, the Franks and the Alamanni, entered Gaul at this time. The Gallic Empire ended with Emperor Aurelian's victory at Châlons in 274.