Arrogating it to the Crown

In 1399, John of Gaunt died.
Henry Bolingbroke stood to inherit all his father's vast holdings.
Richard II summarily stripped Bolingbroke of his right to any inheritance, arrogating it to the Crown.

Please explain arrogating it to the Crown.
 
A dictionary definition

ar·ro·gate

verb
take or claim (something) without justification.
"they arrogate to themselves the ability to divine the nation's true interests"
synonyms: assume, take, claim, appropriate, seize, expropriate, wrest, usurp, commandeer.
 
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