Цикл for в JavaScript повторяется слишком много раз по массиву

//var clan_id = 500071433;
var clan_id = 500025989; // FAME

// Get province ID
//TODO: ein Feld zu viel --> Entfernen
var province_list = "https://api.worldoftanks.eu/wot/globalmap/clanprovinces/?application_id=bbdd3a54ffe280ff581db61299acab9c&clan_id = " + clan_id + "&fields=province_name%2C+province_id%2C+arena_id%2C+clan_id%2C+daily_revenue%2C+max_vehicle_level%2C+prime_time%2C+front_id";
// Get JSON Data



fetch(province_list)
  .then(res => res.json())
  .then((out) => {
    loopProvince(out.data[clan_id], out.data);

  })
  .catch(err => {
    throw err
  });



function loopProvince(provinces, jsonData) {
  for (i = 0; i < provinces.length; i++) {
    createCard(i);
    getMaps(jsonData[clan_id][i].arena_id, i);
    changeProvinceDetails(jsonData[clan_id], i + 1);
  }
}

function createCard(i) {
  var card = `
  <div class = "province" id = "province` + (i + 1) + `">
    <div class = "province_title" id = "province_name` + (i + 1) + `">
      <h2>Provinz ` + (i + 1) + `</h2>
    </div>
    <div class = "province_information">
      <div class = "map_name" id = "province_map` + (i + 1) + `">
        <p>Map Name</p>
      </div>
      <div class = "details">
        <div class = "time" id = "province_time` + (i + 1) + `">
          <p>Prime Time: XX:XX Uhr</p>
        </div>
        <div class = "tier" id = "province_tier` + (i + 1) + `">
          <p>Stufe: X</p>
        </div>
        <div class = "income" id = "province_income` + (i + 1) + `">
          <p>Einkommen: X/Tag</p>
        </div>
      </div>  <!-- details -->
    </div>
  </div>
  `;

  document.getElementById('contentid').innerHTML += card;
}

function getMaps(arena_id, i) {
  fetch('./data/maps.json')
    .then((res) => res.json())
    .then((jsonMap) => {
      changeProvinceMap(jsonMap.data[arena_id].name_i18n, jsonMap.data[arena_id].minimap_location, i);
    })
}

// start changing information

function changeProvinceDetails(json, i) {
  changeProvinceName(json[i].province_name, i);
  changeProvinceIncome(json[i].daily_revenue, i);
  changeProvinceTier(json[i].max_vehicle_level, i);
  changeProvinceTime(json[i].prime_time, i);
}

function changeProvinceName(province_name, i) {
  document.getElementById("province_name" + i).innerHTML = "<h2>" + province_name + "</h2>";
}

function changeProvinceMap(province_map, province_minimap, i) {
  document.getElementById("province_map" + i).innerHTML = "<p>" + province_map + "</p>";
  document.getElementById("province_map" + i).setAttribute("style", "background:url(" + province_minimap + "); background-size:cover; background-position:center;");
}

function changeProvinceIncome(province_income, i) {
  document.getElementById("province_income" + i).innerHTML = "<p>Einkommen: " + province_income + " / Tag </p>";
}

function changeProvinceTier(province_tier, i) {
  document.getElementById("province_tier" + i).innerHTML = "<p>Stufe: " + province_tier + "</p>";
}

function changeProvinceTime(province_prime_time, i) {
  document.getElementById("province_time" + i).innerHTML = "<p>Prime Time: " + province_prime_time + " Uhr</p>";
}

body {
  background: #EBEBEB;
  font-family: sans-serif;
  color: #343434;
}

.container {
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-areas: "head" "information" "copyright";
  height: 100vh;
  grid-gap: 50px;
}

header {
  display: grid;
  background: #343434;
  border-bottom: #ACACAC 5px solid;
}

#title {
  grid-area: head;
  padding: 20px;
  font-size: 20px;
  text-transform: uppercase;
  font-weight: bold;
  color: #ffffff;
}

.content {
  grid-area: information;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(600px, 1fr));
  grid-gap: 20px;
  align-items: start;
}

.province {
  background: #ACACAC;
  display: grid;
  grid-template-rows: auto 300px;
}

.province_title {
  display: grid;
  align-items: center;
  justify-items: center;
  background: #343434;
  color: #ffffff;
}

.province_information {
  height: minmax(200px, auto);
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas: "map details";
}

.province_information p {
  margin: 0;
  padding: 0;
}

.province_information .map_name {
  grid-area: map;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  font-weight: bold;
  color: #343434;
  background: white;
  background-position: center;
  background-size: cover;
}

.province_information .map_name>p {
  background: #ffffff;
  padding: 5px;
}

.province_information .details {
  grid-area: details;
  padding: 10px;
  padding-right: 0;
  display: grid;
  grid-gap: 5px;
  align-items: center;
}

.province_information .details .time {
  font-weight: bold;
  text-align: center;
  font-size: 20px;
}

footer {
  padding: 10px;
  gird-area: copyright;
  background: #343434;
  border-top: #ACACAC 3px solid;
  color: #ffffff;
}


/*
          __  __          _ _
    ____ |  /  |        | (_)
   / __ \| \  / | ___  __| |_  __ _
  / / _` | |/| |/ _ / _` | |/ _` |
 | | (_| | |  | |  __/ (_| | | (_| |
  \ \__,_|_|  |_|\___|\__,_|_|\__,_|
   \____/
  */

@media (max-width: 600px) {
  .container {
    grid-gap: 20px;
  }
  .content {
    grid-area: information;
    display: grid;
    grid-template-columns: minmax(70%, 1fr);
    grid-gap: 20px;
    align-items: start;
    justify-items: stretch;
  }
  .province_information {
    height: minmax(200px, auto);
    display: grid;
    grid-template-columns: 1fr;
    grid-template-row: 1fr 1fr;
    grid-template-areas: "map" "details";
  }
  #title {
    text-align: center;
  }
}

<!DOCTYPE html>
<html lang = "en">

<head>
  <meta charset = "UTF-8">
  <meta name = "viewport" content = "width=device-width, initial-scale=1.0">
  <meta http-equiv = "X-UA-Compatible" content = "ie=edge">
  <title>WOT Clan Wars Dashboard</title>
  <link rel = "stylesheet" href = "css/style.css">
  <script type = "text/javascript" src = "javascript/main.js"></script>
</head>

<body>
  <div class = "container">
    <header "head">
      <div id = "title">
        <h1>Clan Wars Dashboard</h1>
      </div>
    </header>
    <div class = "content" id = "contentid">
      <!-- generated by JavaScript -->
    </div>
    <!-- content -->

    <footer>
      Copyright &copy; 2018 Kay Kleinvogel
    </footer>
  </div>

</body>

</html>