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Britain's blockade across the North Sea and the English Channel cut the flow of war supplies, food, and fuel to Germany during World War I. Germany retaliated by using its submarines to destroy neutral ships that were supplying the Allies. -
The political objective of the assassination was to free Bosnia and Herzegovina of Austria-Hungarian rule and establish a common South Slav ("Yugoslav") state. The assassination precipitated the July Crisis which led to Austria-Hungary declaring war on Serbia and the start of World War I -
On 23 July 1914 the Austro-Hungarian government issued Serbia with an ultimatum containing concrete demands in order to prevent an escalation. When the ultimatum is examined closely, it becomes clear that Vienna was concerned to make the demands as unacceptable as possible. -
Because after they declared war on Serbia, the Russians had to join as they held an alliance. This meant that the Austro-Hungarian Forces had to attack Russia or at least Defend. Also They were part of the Central Powers and had an alliance with Germany so they honored this and attacked. -
Kluck was forced to halt his advance prematurely in order to support his flank: he was still no further up the Marne Valley than Meaux. On 9 September Bülow learned that the British Expeditionary Force (BEF) was advancing into the gap between his 2nd Army and Kluck. He ordered a retreat, obliging Kluck to do the same. -
At dawn on 25 April 1915, Allied troops landed on the Gallipoli peninsula in Ottoman Turkey. The Gallipoli campaign was the land-based element of a strategy intended to allow Allied ships to pass through the Dardanelles, capture Constantinople (now Istanbul) and ultimately knock Ottoman Turkey out of the war. -
German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans.some famous personalities were on were"German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans." -
it was the Emperor's obstinacy that caused Italy to enter the war as an enemy of the Danube Monarchy. When Italy joined sides with the Triple Entente, it was on the understanding that the Allies would seek to provide Italy with substantial territorial gains at the cost of Austria-Hungary. -
This World War I siege stemmed from German General Erich von Falkenhayn's edict to elicit major bloodshed from the French defense of the fortress complex around Verdun. German forces advanced quickly in February 1916, claiming Fort Douaumont and Fort Vaux after brutal subterranean melees. -
The Battle of Jutland, fought over two days from 31 May 1916, was the largest sea battle of the First World War. It pitted 151 British warships against 99 German ships and was the first and only time the two battle fleets confronted each other. -
Battle of the Somme, (July 1–Nov. 13, 1916) Allied offensive in World War I. British and French forces launched a frontal attack against an entrenched German army north of the Somme River in France. A weeklong artillery bombardment was followed by a British infantry assault on the still-impregnable German positions. -
The Battle of Verdun, 21 February-15 December 1916, became the longest battle in modern history. It was originally planned by the German Chief of General Staff, Erich von Falkenhayn to secure victory for Germany on the Western Front. The aim was to crush the French army before the Allies grew in strength through the full deployment of British forces. Without France’s ninety-six divisions the Allies would be unable to continue fighting in the west. -
By January 1917, however, the situation in Germany had changed. During a wartime conference that month, representatives from the German navy convinced the military leadership and Kaiser Wilhelm II that a resumption of unrestricted submarine warfare could help defeat Great Britain within five months. -
Following the sinking of an unarmed French boat, the Sussex, in the English Channel in March 1916, Wilson threatened to sever diplomatic relations with Germany unless the German Government refrained from attacking all passenger ships and allowed the crews of enemy merchant vessels to abandon their ships -
Wilson cited Germany's violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, and its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war.