The Battles of Stalluponen and Gumbinnen The Battles of Stalluponen and Gumbinnen MilitaryHistoryOnline.com - Battle of Tannenberg The Battles of Stalluponen and Gumbinnen The Battle of Tannenberg, 1914 The Battle of Tannenberg, 1914 Pertempuran Stalluponen dan Gumbinnen The Battle of Stallupönen and the Battle of Gumbinnen The Battle of Tannenberg, 1914 The Battle of Tannenberg, 1914