For 10 points, name this country which was invaded several times by Denmark during its rule by the House of Wessex, before falling to conquering Normans in 1066.
One ruler of this country caused an invasion of his nation by ordering the St. Brice's Day Massacre. An earlier ruler of this kingdom sought refuge in a peasant woman's house and let the griddle-cakes burn, in an oft-told anecdote. A later winner of the Battle of Edington, who achieved peace with the Treaty of Wedmore, was the only king of this country to earn the epithet "the (*) Great." For 10 points, name this country which was invaded several times by Denmark during its rule by the House of Wessex, before falling to conquering Normans in 1066.
One ruler of this country caused an invasion of his nation by ordering the St. Brice's Day Massacre.
{England} [do not accept "Britain" or "United Kingdom"]