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The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, and his wife Sophie in Sarajevo (the capital of the Austro-Hungarian province of Bosnia-Herzegovina) on 28 June 1914 eventually led to the outbreak of the First World War. -
A month after the assassination of Archduke Franz Ferdinand and his wife Sophie on July 28, 1914, the Austro-Hungarian government declares war on Serbia. Immediately, and within a period of six days, European countries declare war upon one another. -
When Austria-Hungary declared war on Serbia, Serbia's ally Russia started mobilizing for war. Austria-Hungary's ally Germany demanded Russia stop preparing for war. When Russia refused, Germany declared war on Russia on August 1, 1914. -
On July 31, 1914, Germany demanded that France remain neutral, and that the Russians stop mobilizing. Neither country bowed to German demands. When Germany declared war on Russia on August 1, 1914, it knew that war with France would soon follow. Two days later, on August 3, 1914, Germany declared war on France.
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The German invasion of Belgium was a military campaign which began on 4 August 1914. On 2 August, the German government sent an ultimatum to Belgium, demanding passage through the country and German forces invaded Luxembourg. Two days later, the Belgian government refused the German demands and the British government guaranteed military support to Belgium. The German government declared war on Belgium on 4 August; German troops crossed the border and began the Battle of Liège. -
In response Austria-Hungary declared war on Serbia, which had a treaty with Russia, so Russian declared war on Austria-Hungary and its ally, Germany. -
Great Britain and France declare war on Austria-Hungary. Serbia is invaded by Austria-Hungary. -
The First Canadian Contingent sailed for England in October 1914 with over 30,000 volunteers, an extraordinary achievement in such a short time. -
October – November 1914 First Battle of Ypres, France. Germany fails to reach the English Channel. 1914 – 1917 Deadlock and growing death tolls The two huge armies are deadlocked along a 600-mile front of trenches in Belgium and France. For four years, there is little change. -
1914 – 1917 Deadlock and growing death tolls The two huge armies are deadlocked along a 600-mile front of trenches in Belgium and France. For four years, there is little change. Attack after attack fails to cross enemy lines, and the toll in human lives grows rapidly. Both sides seek help from other allies. -
The Battle of Dogger Bank was a naval engagement during the First World War that took place on 24 January 1915 near the Dogger Bank in the North Sea, between squadrons of the British Grand Fleet and the Kaiserliche Marine (High Seas Fleet). The British had intercepted and decoded German wireless transmissions, gaining advance knowledge that a German raiding squadron was heading for Dogger Bank and ships of the Grand Fleet sailed to intercept the raiders. -
Gallipoli Campaign, (February 1915–January 1916), in World War I, an Anglo-French operation against Turkey, intended to force the 38-mile- (61-km-) long Dardanelles channel and to occupy Constantinople. Plans for such a venture were considered by the British authorities between 1904 and 1911, but military and naval opinion was against it. When war between the Allies and Turkey began early in November 1914, the matter was reexamined and classed as a hazardous, but possible, operation. -
The Battles of the Isonzo were a series of twelve battles between the Austro-Hungarian and Italian armies in World War I mostly on the territory of present-day Slovenia, and the remainder in Italy along the Isonzo River on the eastern sector of the Italian Front between June 1915 and November 1917. -
The Battle of Verdun was fought from 21 February to 18 December 1916 on the Western Front in France. The battle was the longest of the First World War and took place on the hills north of Verdun-sur-Meuse. -
The Battle of Jutland was a naval battle fought between Britain's Royal Navy Grand Fleet, under Admiral Sir John Jellicoe, and the Imperial German Navy's High Seas Fleet, under Vice-Admiral Reinhard Scheer, during the First World War. -
The Battle of the Somme, also known as the Somme offensive, was a battle of the First World War fought by the armies of the British Empire and the French Third Republic against the German Empire. It took place between 1 July and 18 November 1916 on both sides of the upper reaches of the river Somme in France. -
The Battle of Vimy Ridge was part of the Battle of Arras, in the Pas-de-Calais department of France, during the First World War. The main combatants were the four divisions of the Canadian Corps in the First Army, against three divisions of the German 6th Army. -
The Kerensky offensive, also called the June offensive in Russia or the July offensive in Western historiography, took place from 1 July [O.S. 18 June] to 19 July [O.S. 6 July] 1917 and was the last Russian offensive of World War I. -
The Third Battle of Ypres, also known as the Battle of Passchendaele, was a campaign of the First World War, fought by the Allies against the German Empire. -
The Battle of Caporetto was a battle on the Italian front of World War I. The battle was fought between the Kingdom of Italy and the Central Powers and took place from 24th of October to 19th of November 1917, near the town of Kobarid, also was near the river Isonzo. -
The Battle of Cambrai was a British attack in the First World War, followed by the biggest German counter-attack against the British Expeditionary Force since 1914. -
The USA was sending 50,000 troops each month to the Western Front, along with vast amounts of weapons and equipment. -
The Second Battle of the Somme of 1918 was fought during the First World War on the Western Front from late August to early September, in the basin of the River Somme. It was part of a series of successful counter-offensives in response to the German Spring Offensive, after a pause for redeployment and supply. -
The Second Battle of the Marne was the last major German offensive on the Western Front during the First World War. The attack failed when an Allied counterattack, supported by several hundreds of tanks, overwhelmed the Germans on their right flank, inflicting severe casualties. -
The Battle of Amiens, also known as the Third Battle of Picardy, was the opening phase of the Allied offensive which began on 8 August 1918, later known as the Hundred Days Offensive, that ultimately led to the end of the First World War. -
The Meuse-Argonne Offensive was the largest operation of the American Expeditionary Forces (AEF) in World War I, with over a million American soldiers participating. It was also the deadliest campaign in American history, resulting in over 26,000 soldiers being killed in action (KIA) and over 120,000 total casualties. -
Allies won the war against The Central Powers -
The Battle of Mons was the first major action of the British Expeditionary Force in the First World War. It was a subsidiary action of the Battle of the Frontiers, in which the Allies clashed with Germany on the French borders.