Æ34 - Trajan L ΙΗ

Year 18 of Trajan's reign fell during the buildup to his Parthian campaign, launched in 115 AD — the most ambitious Roman eastern offensive since Mark Antony. The Alexandrian mint dated its bronzes by regnal year rather than consular or tribunician reckoning, making the L ΙΗ date formula a precise anchor within an otherwise busy administrative period for Egypt, which was simultaneously being organized as a supply base for the invasion.