The Ulster Cycle is a body of medieval Irish heroic legends and sagas which makes up one of the four great cycles of Irish mythology. It features the heroes of the Ulaid, the people who gave their name to the province of Ulster, in the reign of their king Conchobar mac Nessa at Emain Macha (now Navan Fort near Armagh), traditionally dated to the 1st century BC/1st century AD, and their enemies, particularly the Connachta under queen Medb and her husband Ailill. The longest and most important story is the Táin Bó Cúailnge or "Cattle Raid of Cooley", in which Medb raises an army to invade the Cooley peninsula in County Louth and steal the Ulaid's prize bull, Donn Cúailnge, assisted by Fergus mac Róich, a former king of the Ulaid in exile, and opposed only by the teenage Ulaid hero Cú Chulain