Someone

    class MainRoot
    {

            public var container:Sprite = new Sprite;
            
            public function MainRoot()
            {
              
                    addChild( container);
            }
            public function SummonArmy()
            {
              
                    pasukan:Army = new Army(this);
                    container.addChild(pasukan);
            }
    }
     
    class Army
    {
            public var stageRef;
            public function B(_stage)
            {
                    stageRef = _stage;
            }
    }