Zopyrion

In 331 BC, he led an invasion of Scythian lands, "thinking that, if he did not attempt something, he should be stigmatized as indolent".

[2] They marched along the Black Sea coast and besieged Olbia, a colony of Miletus (which was taken by Alexander in 334 BC).

But the Olbians "gave freedom to their slaves, granted the rights of citizenship to foreigners, changed promissory notes and thus managed to survive the siege".

Defeat was probably accomplished beyond the Danube by Getae and Triballi avenging Alexander's devastation of their lands in 335 BC.

Alexander the Great "was affected with various emotions, but felt more joy at learning of the deaths of two rival kings, than sorrow at the loss of Zopyrion and his army".