Front side Hadrian
Hadrian was the first emperor to extensively tour the provinces, donating money for local construction projects as he went. In Britain, he ordered the construction of a wall, the famous Hadrian's Wall as well as various other such defenses in Germany and Northern Africa. His domestic policy was one of relative peace and prosperity.
Back side Roman Trireme
Trireme refers to a class of warships used by the ancient civilizations of the Mediterranean, especially the Phoenicians, ancient Greeks and Romans. The trireme derives its name from its three rows of oars on each side, manned with one man per oar.
On the coin we can see soldiers holding banners. Most coins found from the reign of Hadrian showed military images almost as often as peaceful ones, since Hadrian's policy was peace through strength, even threat. And roman triremes then presented same kind of threat like modern warships do today.
Dura Lex, Sed Lex - "The law is harsh, but it is the law."