If you give someone their marching orders, you ask that person to leave a place or a job because they have done something wrong.

Three players got their marching orders last week. 3名球员上周收到了解雇通知。

She was called into the boss's office and given her marching orders. 她被叫到老板的办公室，收到了解雇通知。

instructions from someone in authority about what you should do

He was waiting for new marching orders from the White House. 他正在等待来自白宫的新命令。