swear allegiance

You and whatever is left of your armies will swear allegiance to me.

I ask my father's men to swear allegiance to me as you did to him.

This then is the power to which I have sworn allegiance.

Each of them said that he was willing to swear allegiance to the other if not chosen.

When asked by the judge, "Didn't you swear allegiance to this country?"

He was imprisoned for several months but swore allegiance to the new King.

Hitler had the officers swear their personal allegiance to him.

I stood before them then, and Father commanded me to swear allegiance to my younger brother.

Once they have sworn their allegiance I will trust them with my life.

Diplomats said he did not want to swear allegiance to a unified country.