This happened in Hungary because all the big things that happened in this year had Hungary. They were the people demanding this is 1956!.
I answered your question:)
Culture. Food, behavior.
History. Common past.
Religion. Majority of shared faith.
Nationality. Belief in common ancestry.
Territory. Boundaries, like Lake Michigan.
Language. Common dialect.
Nation-state. An independent geopolitical unit of people having a common culture and identity.
He shared it with French royals. When he became the King of England he didn't have to share it with anyone anymore and had his own kingdom that was separate from French nobles and French royalty. Since then, 1066, the Norman dynasties ruled the British Isles that they conquered.