Darius I leads his Persian army across the Bosphorus and campaigns unsuccessfully against the Scythians on the Danube.
Harmodius and Aristogeiton (died 514 BC), the killers of the Athenian tyrant Hipparchus
In the Chinese Yuejueshu (Lost Records of the State of Yue) written by the later Han Dynasty author Yuan Kang in the year 52 AD, Wu Zixu (526 BC-484 BC) purportedly discussed different ship types with King Helü of Wu (r. 514 BC-496 BC) while explaining military preparedness.