Question: In the the war he participated in where was the German offensive on the western front stopped in September 1914?

full_context: Document 1: Karl Parts: Karl Parts VR I/1, VR II/2, VR II/3 (15 July 1886 in Palupera Commune, Estonia – 1 September 1941 in Kirov, Soviet Union) was an Estonian military commander during the Estonian War of Independence.
Document 2: Estonia: Some Estonians, unwilling to side directly with the Nazis, joined the Finnish Army (which was allied with the Nazis) to fight against the Soviet Union. The Finnish Infantry Regiment 200 (Estonian: soomepoisid) was formed out of Estonian volunteers in Finland. Although many Estonians were recruited into the German armed forces (including Estonian Waffen-SS), the majority of them did so only in 1944 when the threat of a new invasion of Estonia by the Red Army had become imminent. In January 1944 Estonia was again facing the prospect of invasion from the Red Army and the last legitimate prime minister of the Republic of Estonia (according to the Constitution of the Republic of Estonia) delivered a radio address asking all able-bodied men born from 1904 through 1923 to report for military service. The call resulted in around 38,000 new enlistments and several thousand Estonians who had joined the Finnish Army came back to join the newly formed Territorial Defense Force, assigned to defend Estonia against the Soviet advance. It was hoped[by whom?] that by engaging in such a war Estonia would be able to attract Western support for Estonian independence.
Document 3: First Battle of the Marne: The Battle of the Marne (French: Première bataille de la Marne, also known as the Miracle of the Marne, Le Miracle de la Marne) was a World War I battle fought from 6 -- 10 September 1914. It resulted in an Allied victory against the German armies in the west. The battle was the culmination of the German advance into France and pursuit of the Allied armies which followed the Battle of the Frontiers in August and had reached the eastern outskirts of Paris. A counter-attack by six French armies and the British Expeditionary Force (BEF) along the Marne River forced the Imperial German Army to retreat north - west, leading to the First Battle of the Aisne and the Race to the Sea. The battle was a victory for the Allied Powers but led to four years of trench warfare stalemate on the Western Front.
Document 4: Franco-Prussian War: On 10 October, hostilities began between German and French republican forces near Orléans. At first, the Germans were victorious but the French drew reinforcements and defeated the Germans at the Battle of Coulmiers on 9 November. After the surrender of Metz, more than 100,000 well-trained and experienced German troops joined the German 'Southern Army'. The French were forced to abandon Orléans on 4 December, and were finally defeated at the Battle of Le Mans (10–12 January). A second French army which operated north of Paris was turned back at the Battle of Amiens (27 November), the Battle of Bapaume (3 January 1871) and the Battle of St. Quentin (13 January).
Document 5: Western Front (World War I): The Western Front was the main theatre of war during the First World War. Following the outbreak of war in August 1914, the German Army opened the Western Front by invading Luxembourg and Belgium, then gaining military control of important industrial regions in France. The tide of the advance was dramatically turned with the Battle of the Marne. Following the Race to the Sea, both sides dug in along a meandering line of fortified trenches, stretching from the North Sea to the Swiss frontier with France, which changed little except during early 1917 and in 1918.
Document 6: Western Front (World War I): The German Army came within 70 km (43 mi) of Paris but at the First Battle of the Marne (6 -- 12 September), French and British troops were able to force a German retreat by exploiting a gap which appeared between the 1st and 2nd Armies, ending the German advance into France. The German Army retreated north of the Aisne River and dug in there, establishing the beginnings of a static western front that was to last for the next three years. Following this German retirement, the opposing forces made reciprocal outflanking manoeuvres, known as the Race for the Sea and quickly extended their trench systems from the Swiss frontier to the North Sea. The territory occupied by Germany held 64 percent of French pig - iron production, 24 percent of its steel manufacturing and 40 percent of the coal industry -- dealing a serious blow to French industry.
Document 7: Estonia: Most of the Estonian Defence Forces surrendered according to the orders of the Estonian government, believing that resistance was useless and were disarmed by the Red Army. Only the Estonian Independent Signal Battalion showed resistance to Red Army and Communist militia "People's Self-Defence" units in front of the XXI Grammar School in Tallinn on 21 June. As the Red Army brought in additional reinforcements supported by six armoured fighting vehicles, the battle lasted several hours until sundown. Finally the military resistance was ended with negotiations and the Independent Signal Battalion surrendered and was disarmed. There were two dead Estonian servicemen, Aleksei Männikus and Johannes Mandre, and several wounded on the Estonian side and about ten killed and more wounded on the Soviet side.
Document 8: History of Latvia: The First Latvian National Awakening began in the 1850s and continued to bear fruit after World War I when, after two years of struggle in the Latvian War of Independence, Latvia finally won sovereign independence, as recognised by Soviet Russia in 1920 and by the international community in 1921. The Constitution of Latvia was adopted in 1922. Political instability and effects of the Great Depression led to the May 15, 1934 coup d'état by Prime Minister Kārlis Ulmanis. Latvia's independence was interrupted in June -- July 1940, when the country was occupied and incorporated into the Soviet Union. In 1941 it was invaded and occupied by Nazi Germany, then reconquered by the Soviets in 1944 -- 45.
Document 9: Andres Larka: In 1902 he graduated from Vilnius Military Academy. Larka participated in the Russo-Japanese War and graduated from the Imperial Nicholas Military Academy in 1912. He participated in World War I fighting on the Eastern front against the German Empire, including fighting in East Prussia, Poland and Romania. Larka became the first Minister of War of Republic of Estonia; in March he achieved rank of Major General. In 1918, during the German occupation, he participated in organising the Defence League. After the start of the Estonian Liberation War in 1918, Larka soon moved from position of Minister of War to Chief of Staff. In February 1919 he became the aide of the Minister of War and held that position to the beginning of 1925. In that position his job was to organize mobilization and actions of reserve units. After the war he also organized demobilization. He retired in 1925 because of health issues. In 1930 he became official leader of the League of Liberators and was their candidate in the April 1934 presidential elections. But on 12 March 1934, as it seemed likely that Larka would be elected, Konstantin Päts and Johan Laidoner made a coup d'état in order to prevent him from winning the elections. The elections were postponed indefinitely, Larka and about 400 of his closest supporters were imprisoned and authoritarian rule was established. Larka was in prison twice (1934-1935 and 1935-1937). In 1940 the Soviet occupation authorities arrested Larka; he died in imprisonment in 1943.
Document 10: Margus Tsahkna: In 2000, he joined the "Pro Patria" party. From 2001 to 2004 he was chairman of "Noor-Isamaa", the party's youth organisation. From 2001 to 2003 he was a member of Tartu city council. From 2003 to 2006 he was the party's political secretary. After the affiliation of the "Pro Patria" and "Res Publica" parties, to form the "Pro Patria ja Res Publica Liit" party, he was secretary general from 2007 to 2010, and political secretary from 2010 to 2013. In 2013 he became assistant chairman. He has been a member of the Estonian parliament since 2007, the member of the parliaments finance committee and social committee. He has also acted as a chairman of the parliaments social committee from 2011-2014.
Document 11: Modern history: Much of the fighting in World War I took place along the Western Front, within a system of opposing manned trenches and fortifications (separated by a "No man's land") running from the North Sea to the border of Switzerland. On the Eastern Front, the vast eastern plains and limited rail network prevented a trench warfare stalemate from developing, although the scale of the conflict was just as large. Hostilities also occurred on and under the sea and—for the first time—from the air. More than 9 million soldiers died on the various battlefields, and nearly that many more in the participating countries' home fronts on account of food shortages and genocide committed under the cover of various civil wars and internal conflicts. Notably, more people died of the worldwide influenza outbreak at the end of the war and shortly after than died in the hostilities. The unsanitary conditions engendered by the war, severe overcrowding in barracks, wartime propaganda interfering with public health warnings, and migration of so many soldiers around the world helped the outbreak become a pandemic.
Document 12: Warsaw: Warsaw was occupied by Germany from 4 August 1915 until November 1918. The Allied Armistice terms required in Article 12 that Germany withdraw from areas controlled by Russia in 1914, which included Warsaw. Germany did so, and underground leader Piłsudski returned to Warsaw on 11 November and set up what became the Second Polish Republic, with Warsaw the capital. In the course of the Polish-Bolshevik War of 1920, the huge Battle of Warsaw was fought on the eastern outskirts of the city in which the capital was successfully defended and the Red Army defeated. Poland stopped by itself the full brunt of the Red Army and defeated an idea of the "export of the revolution".
Document 13: Peter Lacy: When the Russo-Swedish War broke out in 1741, the government of Anna Leopoldovna appointed him Commander-in-Chief as the most experienced among Russian generals. Lacy quickly struck against Finland and won his last brilliant victory at Lappeenranta (August 1741). Lacy's force, however, was poorly supplied and he was forced to withdraw to St Petersburg. The following year he rallied his forces and proceeded to capture Hamina, Porvoo and Hämeenlinna, by August encircling more than 17,000 Swedes near Helsinki and effectively bringing the hostilities to an end.
Document 14: British Expeditionary Force (World War II): The BEF (General Lord Gort) began moving to France in September 1939. The British assembled along the Belgian -- French border on the left of the French First Army as part of the French 1er groupe d'armées (1st Army Group) of the Front du Nord - est (North - Eastern Front). Most of the BEF spent the Phoney War digging field defences on the French -- Belgian border, before the Battle of France (Fall Gelb) began on 10 May 1940. The BEF constituted 10 percent of the Allied forces on the Western Front. The BEF participated in the Dyle Plan, a rapid advance into Belgium to the line of the river Dyle but had to retreat through Belgium and north - western France with the rest of the 1er groupe d'armées, after the German breakthrough further south at the Battle of Sedan. The BEF, French and Belgian forces cut off north of the Somme river were evacuated from the French North Sea coast through port and beaches of Dunkirk in Operation Dynamo.
Document 15: Franco-Prussian War: While the republican government was amenable to war reparations or ceding colonial territories in Africa or in South East Asia to Prussia, Favre on behalf of the Government of National Defense, declared on 6 September that France would not "yield an inch of its territory nor a stone of its fortresses." The republic then renewed the declaration of war, called for recruits in all parts of the country and pledged to drive the German troops out of France by a guerre à outrance. Under these circumstances, the Germans had to continue the war, yet could not pin down any proper military opposition in their vicinity. As the bulk of the remaining French armies were digging-in near Paris, the German leaders decided to put pressure upon the enemy by attacking Paris. By September 15, German troops reached the outskirts of the fortified city. On September 19, the Germans surrounded it and erected a blockade, as already established at Metz.
ground_truth: First Battle of the Marne
sub_queries: In what war did he participate? Answer: World War I
where was the initial german offensive on World War I i western front stopped in september 1914 Answer: First Battle of the Marne