Kalends of January
. AD 977 alias 978.
Fiachra, superior of Í, rested.
A battle between Brian son of Cennétig and Mael Muad, king of Desmumu, in which Mael Muad fell.
The battle of Bithlann was won over the Laigin by the foreigners of Áth Cliath, and in it fell the king of Laigin, i.e. Úgaire son of Tuathal, and many others.
The Airgialla inflicted a battle-rout on the Cenél Conaill, in which Niall ua Canannáin and many others fell.
Corcach Mór of Mumu was sacked by fire.
Les Mór Mo-Chutu was plundered and burned.