Year 227 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Flaccus and Regulus (or, less frequently, year 527 Ab urbe condita). The denomination 227 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.
Queen Teuta of Illyria finally surrenders to Roman forces and is forced by the Romans to accept an ignominious peace. The Romans allow her to continue her reign but restrict her to a narrow region around the Illyrian capital, Shkodra, deprive her of all her other territory, and forbid her to sail an armed ship below Lissus just south of the capital. They also require her to pay an annual tribute and to acknowledge the final authority of Rome.
The Spartan King Cleomenes III imposes reforms on his kingdom which include the cancelling of debts, providing land for 4,000 citizens, and restoring the training of youth in the martial arts. The Ephorate, five elected magistrates who, with the King, form the main executive body of the state, is abolished (four of the five ephors being executed); the powers of the Gerousia, the oligarchic council of elders, is curtailed; and the patronomoi (the board of six elders) is introduced. Cleomenes' changes are designed to make the monarchy supreme and re-create a society of aristocrats, while neglecting Sparta's helots (serfs) and perioikoi (free but non-citizen inhabitants). Eighty opponents of the reforms are exiled, while his brother Eucleidas is installed as co-ruler in the place of the murdered Archidamus V.