Meaning of the word "marching orders" in English

What does "marching orders" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

marching orders

US /ˈmɑːr.tʃɪŋ ˈɔːr.dərz/
UK /ˈmɑː.tʃɪŋ ˈɔː.dəz/
"marching orders" picture

Idiom

an order to leave or to begin an activity

Example:
The boss gave him his marching orders after he failed to meet the deadline.
We received our marching orders for the new project this morning.