278 BC Chr.

278 BC Chr.
Pyrrhus goes on his campaign to Sicily .
278 BC In other calendars
Buddhist calendar	266/267 (southern Buddhism); 265/266 (alternative calculation according to Buddha's Parinirvana )
Chinese calendar	40th (41st) cycle , year of the water sheep 癸未 ( at the beginning of the year water horse 壬午)
Greek calendar	2nd / 3rd Year of the 125th Olympiad
Jewish calendar	3483/84
Roman calendar	from urbe condita CDLXXVI (476)
Seleucid era	Babylon: 33/34 (turn of April); Syria: 34/35 (turn of the year October)

Events

The Northern League , consisting of Bithynia under King Nicomedes I , the Greek cities on the Black Sea coast and the Empire of Pontus , offer the Galatians who invaded Asia Minor (with the tribes of the Tecto sagas , Tolistobogier and Trokmer ) themselves in the landscape then named after them Galatia to settle in the Anatolian highlands around Ankara and Gordion in order to undertake raids against the Seleucid Empire from there.
Antigonus II. Gonatas and Antiochus I make peace.
Arsinoë II , sister of the Egyptian king Ptolemy II , ensures that his wife Arsinoë I is convicted and banished for alleged conspiracy; Arsinoë II then married Ptolemy himself, taking up the ancient Egyptian tradition of sibling marriages of the pharaohs .

Syracuse , which is attacked by Carthage , calls on Pyrrhus of Epirus, who then interrupts the costly war against the Romans and moves to Sicily . At the same time, Carthage allies itself with Rome and sends an auxiliary fleet under Mago to Ostia . The Romans gain ground in southern Italy through victories over the Lucanians, Samnites and Bruttians.
Roman troops, sent to Rhegium to protect the city, rise up against the local population and establish their own rule.