

A year of imperial crisis where a catastrophic Roman military defeat in Germany forever altered the empire's ambition and its emperor's psyche.
The year AD 15 was not one of grand foundations, but of grim reckoning. In the Roman Empire, the shadow of the previous year's disaster in the Teutoburg Forest—where three legions were annihilated—loomed large. Emperor Tiberius, now firmly in power, dispatched his nephew Germanicus to the Rhine frontier not for conquest, but for salvage. The mission was one of recovery and reprisal: to locate the lost legionary standards and bury the bones of the fallen, a gruesome task that served as both a morale operation and a political spectacle. Germanicus led punitive raids across the Rhine, clashing with Germanic tribes but achieving no permanent territorial gain. Meanwhile, in Rome, Tiberius grappled with the political fallout, his rule beginning under the omen of military catastrophe. This year cemented the Rhine as the empire's northern limit, a psychological frontier born of trauma.
The biggest hits of 15
The world at every milestone
The consuls for the year were Drusus Julius Caesar, son of Tiberius, and Gaius Norbanus Flaccus.
The Roman poet Ovid, in exile on the Black Sea, was likely writing his 'Epistulae ex Ponto' (Letters from the Black Sea) during this year.
According to Tacitus, Germanicus's men discovered the grisly site of the Varus battle, with whitening bones and skulls nailed to trees.
In China, this was part of the Xin dynasty under the usurper Wang Mang, a period of great social upheaval.
“The Rhine frontier is a wound that will not close.”