View source for 257 BC

=== By place ===
==== Roman Republic ====
* The [[Roman Republic|Romans]] attack [[Sardinia]] and try to capture it from the [[Carthage|Carthaginians]].
* The [[Battle of Tyndaris]] is fought between the Roman fleet (with [[Gaius Atilius Regulus (consul 257 BC)|Gaius Atilius Regulus]] in command) and the Carthaginian fleet off [[Tyndaris]] (modern [[Tindari]]) in [[Sicily]]. [[Hiero II of Syracuse|Hiero II]], tyrant of [[Syracuse, Sicily|Syracuse]], has allowed Tyndaris to be a base for the Carthaginians. However, after this battle, the town falls to Roman forces.

==== China ====
* The [[State of Qin|Qin]] siege of [[Handan]], the capital of the [[State of Zhao]]:
:* The [[State of Chu]] and the [[State of Wei]] send armies to assist Zhao against the Qin, and they defeat the Qin army of Wang He outside Handan. This forces Wang He to lift the siege.
:* The Qin general [[Bai Qi]] is executed for his refusal to take command of the siege.<ref>{{cite book|first=Sima|last= Qian|title=Records of the Grand Historian, Section: Bai Qi}}</ref>

==== Vietnam ====
* [[Thục Phán]] ([[An Dương Vương]]), Chief of the Thục Tribe of the Âu Việts, defeats the [[Văn Lang]] Confederacy and unifies all [[Âu Việt]] and [[Lạc Việt]] tribes, thus founding the Kingdom of [[Âu Lạc]] and the [[Thục dynasty]].
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