who proclaimed that the western frontier was closed
Frontier Thesis Turner saw the land frontier was ending, since the U.S. Census of 1890 had officially stated that the American frontier had broken up. He sounded an alarming note, speculating as to what this meant for the continued dynamism of American society as the source of U.S. innovation and democratic ideals was disappearing.[citation needed]
Battle of the Frontiers The Battle of the Frontiers (Dutch: Slag der Grenzen, French: Bataille des FrontiÃ¨res, 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.