"an army marches on its stomach" meaning in English

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  "etymology_text": "Unknown; first attributed to Frederick the Great, and often attributed to Napoleon Bonaparte.",
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      "expansion": "an army marches on its stomach",
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      "glosses": [
        "You must eat properly if you want to perform tasks well."
      ],
      "id": "en-an_army_marches_on_its_stomach-en-proverb-bfHw5J8v",
      "links": [
        [
          "eat",
          "eat"
        ]
      ],
      "translations": [
        {
          "code": "da",
          "lang": "Danish",
          "sense": "Translations",
          "word": "uden mad og drikke duer helten ikke"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "leipä miehen tiellä pitää"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "ohne Mampf kein Kampf"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "Translations",
          "word": "uten mat og drikke duger helten ikke"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "word": "armia maszeruje na brzuchu"
        }
      ],
      "wikipedia": [
        "Frederick the Great",
        "Napoleon Bonaparte"
      ]
    }
  ],
  "word": "an army marches on its stomach"
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        "You must eat properly if you want to perform tasks well."
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          "eat",
          "eat"
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      "wikipedia": [
        "Frederick the Great",
        "Napoleon Bonaparte"
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  "translations": [
    {
      "code": "da",
      "lang": "Danish",
      "sense": "Translations",
      "word": "uden mad og drikke duer helten ikke"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "leipä miehen tiellä pitää"
    },
    {
      "code": "de",
      "lang": "German",
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      "word": "ohne Mampf kein Kampf"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "Translations",
      "word": "uten mat og drikke duger helten ikke"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "word": "armia maszeruje na brzuchu"
    }
  ],
  "word": "an army marches on its stomach"
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