The Great World War (8 February 1904 – 5 September 1905) also known as the Trans-oceanic War was the biggest conflict in the XX Century, originated from the colonialistic ambitions of the European and American Superpowers, deteriorated into a trench war in Europe and massive naval engagements in the North Atlantic as well as the North and mostly South Pacific.
In the 19th Century, the major European and American powers had gone to great lengths to maintain a balance of power throughout the Atlantic and Europe, resulting in the existence of a complex network of political and military alliances throughout the continents by 1900. These had started in 1815, with the Holy Alliance between Prussia, Russia, and Austria, however Russia decline due to his commitments with Constantinople. In 1882, this alliance was expanded to include Italy in what became the Triple Alliance. Chancellor Otto Von Bismarck had especially worked to hold Russia and Byzance at Germany's side to avoid a potential two-front war with France and Russia. When Wilhelm II ascended to the throne as the Kaiser, Bismarck was compelled to retire and his system of alliances was gradually de-emphasised. For example, the Kaiser refused to renew the Reinsurance Treaty with Russia in 1890 while maintaining only a commercial one with Constantinople. Two years later, the Franco-Russian Alliance was signed to counteract the force of the Triple Alliance. In 1904, Britain signed a series of agreements with France, the Entente Cordiale, in 1905 France signed a convention with Byzance and in 1907 Britain and Russia signed the Anglo-Russian Convention. While these agreements did not formally ally Britain with France or Russia, they made British entry into any future conflict involving France or Russia a possibility, however leaving its historically fragile relationship with the Byzantine Kingdom at a temporal halt; and this system of interlocking bilateral agreements became known as the Entente.
German industrial and economic power had grown greatly after unification and the foundation of the Reich in 1871. From the mid-1890s on, the government devoted significant economic resources for building up the Kaiserliche Marine (Imperial German Navy), in rivalry with the Byzantine Navy and the British Royal Navy for world naval supremacy. As a result, each nation strove to out-build the other in terms of capital ships. The resulting arms race between Constantinople, Britain and Germany eventually extended to the rest of Europe, with all the major powers devoting their industrial base to producing the equipment and weapons necessary for a pan-European conflict.
In America, the Aztecs allied to the CSA and facing the USA as commercial rivals, begin to experienced difficulties when they choose the Commercial Kriegsmarine as their main allied over the Byzantine or British, causing a crescent rift with them. The Silberach Republic, as well, chose to side with it's motherland (even though they had rejected to join the Deutsche Reich in 1871).
July 1914 crisis
The Assassination of Austrio-Hungarian heir Franz Ferdinand by a radical Bosnian student asking for the independization of Bosnia from Serbia, led to the Austro-Hungarian Reich invasion of Serbia, a traditional and political ally to The Russian Empire who in retaliation launched an European Campaign on the Reich, due to this each nation called it's allies to intervene: Germany in behalf of Austria and The Byzantines in behalf of Russia, as well as France and Britain against Germany.
1914: After the July Crisis the Entente nations (France, Britain, Byzance and Russia) fought only on European soil, against the Central Powers (The Deutsche Rich and the Austria-Hungary Empire).
1915: the Ottoman Empire enters the "European War" in behalf of the Germany (mostly in hopes of capturing Russian and Byzantine territories) as well as the Italian Confederation due to commercial conflicts with Constantinople. The Final nation to join is the Confederate States of America due to Ideological conflicts with Britain and proximity to the Prussian politics.
1916: The Trench War is stalemated, The German Naval Advance over African outpost causes the Portugal Republic to enter the conflict on the Entente side. In America, The CSA sent troops, at the end of the year the USA has signed a military alliance with the Entente to counteract the CSA actions.
1917: The War is Outside of Europe now. In the Atlantic, The Aztec Empire enters the war due to the USA attacking the CSA, while Silberach begins hostilities against a British Blockade, by the end of the Year, Brazil will aligned itself with the USA nad the British against the Silberach Republic. In Pacific Asia, India enters the war allied to the Byzantine Kingdom it's traditional ally, The Sultanate of Aceh enters in behalf of its Ottoman Allies mostly due to a French Naval Invasion, and looking to annex the Johor; The Republic of Johor enters the war sided with the French to counteract the Aceh hostilities against them.
- Definitive unification of the German States as a singular nation separated from several territories (ultramarines even) and Austria.
- Division of Austria from Hungary.
- The Ottoman Empire was forced to recognize the independence of the Levantine region as well as the Armenian country.
- Introduction of airplanes and radio communications in modern warfare.
- Creation of the League of Nations, a multinational organization that promotes peace and human development.