"Graveyard of Empires" meaning in English

{
  "etymology_text": "From the several historical instances of foreign powers (namely, the British Empire, Soviet Union and United States) having been unable to achieve military victory in Afghanistan in the modern period, and as a result, collapsed or significantly weakened thereafter.",
  "forms": [
    {
      "form": "the Graveyard of Empires",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "graveyard of empires",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Graveyard of Empires"
      },
      "expansion": "the Graveyard of Empires",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
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          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Afghanistan",
          "orig": "en:Afghanistan",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Nicknames for countries",
          "orig": "en:Nicknames for countries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Afghanistan."
      ],
      "id": "en-Graveyard_of_Empires-en-name-iDOITthI",
      "links": [
        [
          "Afghanistan",
          "Afghanistan"
        ]
      ],
      "raw_glosses": [
        "(figurative) Afghanistan."
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "Graveyard of Empires"
}

{
  "etymology_text": "From the several historical instances of foreign powers (namely, the British Empire, Soviet Union and United States) having been unable to achieve military victory in Afghanistan in the modern period, and as a result, collapsed or significantly weakened thereafter.",
  "forms": [
    {
      "form": "the Graveyard of Empires",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "graveyard of empires",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Graveyard of Empires"
      },
      "expansion": "the Graveyard of Empires",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
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        "English proper nouns",
        "English uncountable nouns",
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        "en:Afghanistan",
        "en:Nicknames for countries"
      ],
      "glosses": [
        "Afghanistan."
      ],
      "links": [
        [
          "Afghanistan",
          "Afghanistan"
        ]
      ],
      "raw_glosses": [
        "(figurative) Afghanistan."
      ],
      "tags": [
        "figuratively"
      ]
    }
  ],
  "word": "Graveyard of Empires"
}