"an army marches on its stomach" meaning in 英語

{
  "categories": [
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 ことわざ",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 成句",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "英語 慣用的表現",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "(慣用的表現, 慣用句) 腹が減っては戦は出来ぬ。（逐語訳: 軍隊は胃の上で行進する）"
      ],
      "id": "ja-an_army_marches_on_its_stomach-en-phrase-EGsjpyG~"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "an army marches on its stomach"
}

{
  "categories": [
    "英語",
    "英語 ことわざ",
    "英語 成句"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "categories": [
        "英語 慣用的表現"
      ],
      "glosses": [
        "(慣用的表現, 慣用句) 腹が減っては戦は出来ぬ。（逐語訳: 軍隊は胃の上で行進する）"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "an army marches on its stomach"
}