"marche de la mort" meaning in French

{
  "forms": [
    {
      "form": "marches de la mort",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "marche de la mort f (plural marches de la mort)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Death",
          "orig": "fr:Death",
          "parents": [
            "Body",
            "Life",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "death march (forced movement of people, on foot, in such circumstances that many die during the journey)"
      ],
      "id": "en-marche_de_la_mort-fr-noun-L44U53o5",
      "links": [
        [
          "death march",
          "death march"
        ]
      ],
      "related": [
        {
          "word": "marche ou crève"
        },
        {
          "word": "marche forcée"
        }
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/maʁ.ʃ(ə) də la mɔʁ/"
    }
  ],
  "word": "marche de la mort"
}

{
  "forms": [
    {
      "form": "marches de la mort",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "marche de la mort f (plural marches de la mort)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "marche ou crève"
    },
    {
      "word": "marche forcée"
    }
  ],
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Death"
      ],
      "glosses": [
        "death march (forced movement of people, on foot, in such circumstances that many die during the journey)"
      ],
      "links": [
        [
          "death march",
          "death march"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/maʁ.ʃ(ə) də la mɔʁ/"
    }
  ],
  "word": "marche de la mort"
}