Year 481 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Vibulanus and Fusus (or, less frequently, year 273 Ab urbe condita). The denomination 481 BC for this year has been used since the early medieval period, when the Anno Dominicalendar era became the prevalent method in Europe for naming years.
The Congress at the Isthmus of Corinth, under the presidency of Sparta, brings together a number of the Greek city states, who agree to the end of the war between Athens and Aegina. They also discuss the threat from the Persians. Athens is unwilling to place her forces under Sparta and its king Leonidas. Gelo, tyrant of Syracuse, wants high command, but Sparta and Athens refuse. However, during the Congress, Gelo has to withdraw due to Carthage's plans to invade Sicily. Finally, Themistocles agrees that Athens' navy serve under a Spartan admiral to achieve the unity of the Greek states. Nevertheless, Thebes and Thessaly are unwilling to support Athens against the Persians and Crete decides to remain neutral.