circle the wagons

Từ điển Oxford Advanced Learner 8th

circle the ˈwagons idiom
(NAmE)to join together with people who have the same ideas and beliefs as you, and avoid contact with those who do not, who may threaten or attack you
•When your way of life is threatened you have to circle the wagons and defend yourself.
•They immediately circled the wagons around the senator to protect him. From the practice of arranging a ↑wagon train in a circle to defend against attack.
Main entry: ↑circle_idiom