"fall into line" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions verbales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de fall et de line."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "verb",
  "pos_title": "Locution verbale",
  "senses": [
    {
      "glosses": [
        "Rentrer dans le rang, se conformer."
      ],
      "id": "fr-fall_into_line-en-verb-DJzFrjuM"
    }
  ],
  "sounds": [
    {
      "ipa": "\\fɔːl ˈɪn.tə laɪn\\"
    }
  ],
  "word": "fall into line"
}

{
  "categories": [
    "Compositions en anglais",
    "Locutions verbales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de fall et de line."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "verb",
  "pos_title": "Locution verbale",
  "senses": [
    {
      "glosses": [
        "Rentrer dans le rang, se conformer."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\fɔːl ˈɪn.tə laɪn\\"
    }
  ],
  "word": "fall into line"
}