Faithfulness or devotion to a person, a cause, obligations, or duties
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He has gone to them with word of his breaking allegiance to pursue his title without their mediation or interference.
If it is refuge you seek, you will only be granted it by swearing allegiance to us.
The United States is a republic, as even the Pledge of Allegiance says.
He returned to his lawful allegiance in the following year and assisted Czarniecki in his difficult task of expelling Charles X.
I simply wish to refuse allegiance to the State, to withdraw and stand aloof from it effectually.