The primary sources are silent regarding events following the first Persian campaign, but this is an indication of the peace that prevailed and that the Persians had ceased being a threat to the Roman East. The evidence for the second campaign is meager; Zosimus is the only one to mention it specifically. A passage in the thirteenth "Sibylline Oracle" is interpreted by Hartmann as an indication of a second offensive. With the rise of the Sassanid dynasty, Palmyrene trade caravans to the East diminished with only three recorded after 224. The last caravan returned to Palmyra in 266, and this was probably facilitated by the campaign, which probably took place in 266. The King marched directly to Ctesiphon, but he had to break off the siege and march north to face an influx of Germanic raiders attacking Anatolia.