兴师动众的英文：
[Literal Meaning]
move/troops/stir up/mass
to move troops about and stir up the people

[解释]
旧指大规模出兵。现在指动用很多人力做某件事。

[Explanation]
to drag in many people to do something

[例子]
就这么点工作，何必兴师动众地让这么多人去？

[Example]
The job is so easy. Why drag in so many people to do it?

Mobilize a lot of people to do sth.(usually derogatory)
兴师动众

I didn't like to put on airs, and even less to arouse too many people to cater to me.
我不喜欢摆架子，更不喜欢让人家兴师动众来照顾我。