How to effectively close/destroy/terminate sessions?

I have a servlet where i validate the login using POST and logout using GET. So, i want when i click on logout button, i cannot go back to previous page because the session is terminate. But it did not happen. When i click on logout button i still can go back to previous page.

so here is my code of logout in the servlet

protected void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        String action = request.getParameter("action");        if ("logout".equals(action)) {            HttpSession session = request.getSession();            session.invalidate();            response.sendRedirect("loginpage.jsp");        }    }

logoout button code <li class="nav-item"><a class="nav-link" href="logout?action=logout">Logout</a></li>

I redirect to the loginpage but when i "click to go back" at the browser, i still can go back even i check the session

here is the code that i put at every single page to validate the session

<%    HttpSession ses = request.getSession(false);    if (ses == null || ses.getAttribute("name") == null) {        response.sendRedirect("login-form.jsp");        return;    }%>