<Ul> <Li> Rossignol </Li> </Ul> <Li> Trouée de Charmes </Li> <P> The Battle of the Frontiers (Dutch: Slag der Grenzen, French: Bataille des Frontières, German: Grenzschlachten) was a series of battles fought along the eastern frontier of France and in southern Belgium, shortly after the outbreak of the First World War . The battles resolved the military strategies of the French Chief of Staff General Joseph Joffre with Plan XVII and an offensive interpretation of the German Aufmarsch II deployment plan by Helmuth von Moltke the Younger . The German concentration on the right (northern) flank, to wheel through Belgium and attack the French in the rear, was delayed by the movement of French Fifth Army (General Charles Lanrezac) towards the north - west to intercept them and the presence of the British Expeditionary Force (BEF) on his left flank . The Franco - British were driven back by the Germans, who were able to invade northern France . French and British rearguard actions delayed the German advance, allowing the French time to transfer forces on the eastern frontier to the west to defend Paris, resulting in the First Battle of the Marne . </P> <P> Belgian military planning assumed that other powers would assist the Belgian Army to eject an invader and a formal alliance between France and Britain was not solidified by a potential German invasion, despite the Anglo - French Entente (1904). The Belgians judged that the British attitude towards their country had changed and that Belgium had come to be seen as a British protectorate . A General Staff was formed in 1910 but the Chef d'État - Major Général de l'Armée, Lieutenant - Général Harry Jungbluth was retired on 30 June 1912 and not replaced by Lieutenant - General Chevalier de Selliers de Moranville until May 1914 . Moranville began planning for the concentration of the army and met Belgian railway officials on 29 July . </P>

Where did the battle of the frontiers take place