"failed" . . "recapture Petra" . . . . "Garrison:" . "~40,000" . . . . . "*7,000 regular Byzantines" . "*1,000Tzani" . . . "put Petra under siege" . "8,000+" . . . "failure at Petra" . . . "Petra, 549 Siege of" . "laid siege to Petra" . "Eastern Roman (Byzantine) Empire" . . "Sasanian Empire" . "*Unknown number of Lazi" . "1,500" . "Reinforcements:" . "Siege of Petra (549)" . . "Byzantine Empire" . "set siege" . "Siege of Petra (549)" . . "Lazica" . "Sasanian victory" . . "failed to retake" . . "besieged" . . . . . . "Unknown" . . "besiege Petra, Lazica" .