arma-server-web-admin/public/js/app/models/mission_rotation.js

define(function (require) {

  "use strict";

  var $                   = require('jquery'),
      _                   = require('underscore'),
      Backbone            = require('backbone');

  return Backbone.Model.extend({
    defaults: {
      name: '',
      difficulty: 'recruit',
    },
  });

});