allegiance
noun [ C or U ] formal uk/əˈliː.dʒəns/ us/əˈliː.dʒəns/
（对统治者、国家、群体或信仰的）忠诚，忠贞;拥戴，拥护
loyalty and support for a ruler, country, group, or belief
Soldiers have to swear allegiance to the Crown/the King. 士兵必须宣誓效忠国王。
In many American schools, the students pledge allegiance (to the flag) at the beginning of the school day. 在很多美国学校里，学生每天上课前要（向国旗）进行宣誓。
As an Englishman who'd lived for a long time in France, he felt a certain conflict of allegiances when the two countries played soccer. 作为一个在法国生活了很长时间的英国人，当两国足球队比赛时，对于要支持哪一方，他的内心会有一番思想斗争。