An army marches on its stomach.(兵士は胃袋で歩く)で、かのナポレオンが残した台詞として有名です。意味はOne (or a group) needs food in order to complete a task or function efficiently.で、腹が減っては戦は出来ぬと同義です。0:32 they say that an army marches on its stomach.
Cannon Haut Cuisine
0:45 there is a great deal of truth in the adage that an army marches on its stomach. 腹が減っては戦は出来ぬというのは本当だ。
Army Cooks (1960)
練習問題解答
b-0397 a salesman travels on a stomach
b-1946 an army marches on its stomach
b-2615 an army marches on its stomach