vikings By Footballrocks!! May 3, 789 Vikings began their attacks on england May 25, 840 Vikings settlers found the city of Dublin in Ireland Feb 26, 900 The Vikings raid along the the meditermanean sea Dec 25, 981 Vikings Leader erik the red discovered Greenland Jun 30, 986 Vikings ships sail in the newfound land waters Jan 26, 1015 Vikings founsd a settlement in North American Apr 28, 1050 Vinkings found the city of Oslo in Norway.