Title: World War I
Content:   World War I, often abbreviated as WWI or WW1, also known as the First World War or the Great War, was a global war that began on 28 July 1914 and ended on 11 November 1918. It involved much of Europe, as well as Russia, the United States and Turkey, and was also fought in the Middle East, Africa and parts of Asia. One of the deadliest conflicts in history, an estimated 9 million were killed in combat, while over 5 million civilians died from occupation, bombardment, hunger or disease. The genocides perpetrated by the Ottomans and the 1918 Spanish flu pandemic spread by the movement 
Title: Key events of the 20th century
Content:  The First World War (or simply WWI), termed "The Great War" by contemporaries, started in 1914 and ended in 1918. It was ignited by the Assassination in Sarajevo of the Austro-Hungarian Empire's heir to the throne, Erzherzog Franz Ferdinand, by Gavrilo Princip of the organization "Young Bosnia," Bosnian Serbs' liberation movement. Bound by Slavic nationalism to help the small Serbian state, the Russians came to the aid of the Serbs when they were attacked. Interwoven alliances, an increasing arms race, and old hatreds dragged Europe into the war. The Allies, known initially as "The Triple Entente", comprised the British Empire, France, Italy, and Russia. Germany, Austria-Hungary, Bulgaria, and later the Ottoman Empire, were known as "The Central Powers". In 1917, Russia ended 
Title: First World War centenary
Content:  The First World War centenary was the centenary of the First World War, which began on 28 July 2014 with a series of commemorations of the outbreak of the war organised across the continent of Europe, and ended on 11 November 2018 with the centenary of the 1918 Armistice, during which multiple commemorations were held globally, including an international ceremony in Paris.
Title: Europe
Content:   Two world wars and an economic depression dominated the first half of the 20th century. World War I was fought between 1914 and 1918. It started when Archduke Franz Ferdinand of Austria was assassinated by the Yugoslav nationalist Gavrilo Princip. Most European nations were drawn into the war, which was fought between the Entente Powers (France, Belgium, Serbia, Portugal, Russia, the United Kingdom, and later Italy, Greece, Romania and the United States) and the Central Powers (Austria-Hungary, Germany, Bulgaria and the Ottoman Empire). The war left more than 16 million civilians and military dead. Over 60 million European soldiers were mobilised from 1914 to 
Title: Outline of World War I
Content:  The following outline is provided as an overview of and topical guide to World War I: World War I – major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It involved all the world's great powers, which were assembled in two opposing alliances: the Allies (centred on the Triple Entente of Britain, France and Russia) and the Central Powers (originally centred on the Triple Alliance of Germany, Austria-Hungary and Italy). More than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history. More than 9 million combatants were killed, largely because of great technological advances in firepower without corresponding advances in mobility. It was the sixth deadliest conflict in world history, subsequently paving the way for various political changes such as revolutions in the nations involved.
Title: War guilt question
Content:  Hostilities in World War I took place mostly in Europe between 1914 and 11 November 1918, and involved mobilization of 70 million military personnel and resulted in over 20 million military and civilian deaths (exclusive of fatalities from the 1918 Spanish flu pandemic, which accounted for millions more) making it one of the largest and deadliest wars in history. By July 1914, the great powers of Europe were divided into two coalitions: the Triple Entente, later called the "Allied Powers", consisting of France, Russia, and Britain; and the Triple Alliance of Germany, Austria-Hungary, and Italy (the "Central Powers"). After a series of events, ultimatums, and mobilizations, some of them due to interlocking alliances, Germany declared war on Russia on 1 August. Within days the other powers followed suit, and before the end of 
Title: World War One (TV series)
Content:  The series begins with a review of the rivalries and tensions between the major European powers from 1870 to 1914, which culminated with the assassination of Archduke Franz Ferdinand and his wife Sophie in the city of Sarajevo by members of the Serbian Black Hand. The series then followed the course of the war, showing how more countries both in and out of Europe, such as Japan, the Ottoman Empire, Bulgaria, Romania and the United States, became involved in the war, as well as the war's various fighting fronts and campaigns. Various episodes examined the German atrocities in Belgium, the war at sea, trench warfare, the Russian Revolution, the Italian Front, air warfare, America's entry into the war, the home fronts of the various participants, the music of that era, the war's final campaigns, and the war's legacy.
Title: World War I
Content:  The term world war was first coined in September 1914 by German biologist and philosopher Ernst Haeckel. He claimed that "there is no doubt that the course and character of the feared 'European War' ... will become the first world war in the full sense of the word," citing a wire service report in The Indianapolis Star on 20 September 1914. Prior to World War II, the events of 1914–1918 were generally known as the Great War or simply the World War. In October 1914, the Canadian magazine Maclean's wrote, "Some wars name themselves. This is the Great War." Contemporary Europeans also referred to it as "the war to end war" or "the war to end all wars" due to their perception of its then-unparalleled scale and devastation. After World WarII began in 1939, the terms became more standard, with British Empire historians, including Canadians, favouring "The First World War" and Americans "World WarI".
Title: 1910s
Content:  The 1910s (pronounced "nineteen-tens") was a decade of the Gregorian calendar that began on January 1, 1910, and ended on December 31, 1919. The 1910s represented the culmination of European militarism which had its beginnings during the second half of the 19th century. The conservative lifestyles during the first half of the decade, as well as the legacy of military alliances, was forever changed by the assassination, on June 28, 1914, of Archduke Franz Ferdinand, the heir presumptive to the Austro-Hungarian throne. The murder triggered a chain of events in which, within 33 days, World War I broke out in Europe on August 1, 1914. The conflict dragged on until a 
Title: History of Europe
Content:  1914: Archduke Franz Ferdinand of Austria is assassinated; World War I begins. ; 1917: Vladimir Lenin and the Bolsheviks seize power in the Russian Revolution. The ensuing Russian Civil War lasts until 1922. ; 1918: World War I ends with the defeat of Germany and the Central Powers. Ten million soldiers killed; collapse of Russian, German, Austrian, and Ottoman empires. ; 1918: Collapse of the German Empire and monarchic system; founding of Weimar Republic. ; 1918: Worldwide Spanish flu epidemic kills millions in Europe. ; 1918: Austro-Hungarian Empire dissolves. ; 1919: Versailles Treaty strips Germany of its colonies, several provinces and its 

Question: when did world war one begin and end?
Answer: 28 July 1914.
11 November 1918.