The soldiers pledged their loyalty to their country.
allegiance
Frequency:
70
%
He pledged his allegiance to the king.
devotion
Frequency:
65
%
She pledged her devotion to her family.
commitment
Frequency:
60
%
They pledged their commitment to finishing the project on time.
Idiomatic Expressions for pledged
Phrase: pledge one's support
Meaning: to promise to help or assist someone or something
Usage: The community pledged their support to the family who lost their home in a fire.