978 - Failed settlement in Greenland

Skull of a Nordic settler in Greenland
An attempt to settle Gunnbjørn’s skerries a group of islands near Greenland. The attempt was led by Snaebjorn Galti and 11 men it ended in a disaster. The men killed each other.
Outdoor food supply ruin in Greenland
At the battle of Cathair Cuan Brian Boru defeated the Vikings of Limerick and Ivar of Limerick was killed.

Vladimir came back from Norway with a viking mercenary army and re-captured Novgorod.  He also fought with his brother Yaropolk, but he defeated his brother.
Vladimir the great ruled the Rus until 1015. Yaroslav the wise was born.
Troops were deployed in North Wales to prevent an invasion from Dublin Viking mercenaries.