The First World War starter because the Archduke of Austria Francesco Ferdinando of Hapsburg was killed in Sarajevo on 28 June 1914 by the irredentist Serbian student Gavrilo Princip. In a short while due to the various alliances among European countries: the Austro-Hungarian Empire, Germany and Turkey on one side, Russia, France, England, followed by Italy, Japan and the USA on the other, nearly all of Europe was involved: from the Urals to the Pyreneans, from the North Sea to the African Sea. All the lands of the British Commonwealth also entered the war: meaning that it could truly be called the First World War.
The Europe that took part in that crazy enterprise was characterised by countries with varying levels of technological progress: backward, mainly peasant Russia, against Germany and England where heavy industry and steel in particular already lead the economy of the continent. France, followed by Italy, were on lower industrialisation levels, where the geographic and social articulation, division between an economically developing north and a backward slow south, gave the image of a “two-speed” country.
Beyond the oceans, the USA and Japan already represented new economic poles and political influence. Japan had surprised the world by beating Russia in 1905 in the Manchurian war, the first where a modern war fleet was used, that of Japan, and on the battlefields airplanes and machine guns were used. The USA had never been measured in a war by the Europeans, except for the Cuba war against Spain, but it was no surprise when the American Giant could have made the difference once it entered the field, as it did in 1917. The Pittsburgh steelworks and mechanical industry took giant steps forward: Henry Ford already represented a lesson for the entire industrialised world.
This was the scene when the armies entered battle and brought all the technology and industry with them, at the turn of the century between 1800 and 1900, in military form onto the battlefields.
The trenches, skies and seas became places of technological experimentation, terrifying laboratories where all types of offensive and defensive instruments were tested.
Airplanes that had already been used in the Libyan war in 1911 were increasingly used in all the battle areas, first as observers and reconnaissance, then as bombers.
Increasingly powerful artillery sowed death and destruction in all the battles; it is calculated that they caused 70% of deaths.
Several arms were invented during the First World War: for example among the barbed wire fences and trenches of the French Front, for example the light tanks appeared, a terrible arm that is still widely used to day in the modern version by all the armies in the world.
Machine guns and flame throwers added even more horror to the desperate conditions of the soldiers of all the armies involved, like the gases which were often used by all and were so horrifying that it was internationally agreed that they should never be used again in any future wars.