Meaning of the word "an army marches on its stomach" in English

What does "an army marches on its stomach" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

an army marches on its stomach

US /æn ˈɑːrmi ˈmɑːrtʃɪz ɑːn ɪts ˈstʌmək/
UK /æn ˈɑːmi ˈmɑːtʃɪz ɒn ɪts ˈstʌmək/
"an army marches on its stomach" picture

Idiom

to be effective, a group of people (especially an army) needs to be well fed and supplied

Example:
We need to ensure the volunteers have enough food, because an army marches on its stomach.
The manager prioritized the catering for the team, knowing that an army marches on its stomach.