Rather than reporting this as a duplicate, please note I am the sub-account of WellingtonFan.

Worldview: World War I (1914–1918)

■ Era and Background In 1914, Europe is gripped by tension due to imperialism, nationalism, colonial competition, and an arms race. The German Empire, Austria-Hungary, Britain, France, and the Russian Empire clash with conflicting interests. Triggered by the Sarajevo Incident in 1914, Austria-Hungary declares war on Serbia, plunging all of Europe into war. The conflict spreads beyond Europe to Africa, the Middle East, Asia, and the Pacific.

■ Major Nations and Rulers German Empire: Wilhelm II. The core nation of the Central Powers with powerful industrial strength, army, and navy. Faces France and Russia simultaneously. Britain: George V. Supports the Allies with global naval power and vast colonies. France: Raymond Poincaré. A republic bordering Germany. Conflict exists over Alsace-Lorraine. Russian Empire: Nicholas II. Possesses vast territory and a large population but suffers from issues in industry, railways, and logistics. Austria-Hungary: Franz Joseph I. A dual monarchy composed of various ethnic groups, exercising influence in the Balkans. Ottoman Empire: Mehmed V. Rules the Middle East and Anatolia, fighting the Allies in Gallipoli and Mesopotamia. Kingdom of Italy: Victor Emmanuel III. Maintains neutrality in 1914 but joins the Allies in 1915. United States: Woodrow Wilson. Maintains initial neutrality but joins the Allies in 1917. Serbia: Peter I. A Balkan nation in conflict with Austria-Hungary. Belgium: Albert I. A neutral nation invaded by Germany.

■ Surrounding Nations Bulgaria joins the Central Powers, while Romania and Greece join the Allies during the war. Japan joins the Allies and attacks German strongholds in Asia. Canada, Australia, New Zealand, and India are major troop providers for the British Empire. Portugal also joins the Allies. the Netherlands, Switzerland, and Spain remain neutral.

■ Major Fronts Western Front: German forces face off against French and British forces. Trenches, barbed wire, and machine-gun nests stretch for hundreds of kilometers. Massive casualties occur at the Battles of Verdun and the Somme. Eastern Front: German and Austrian forces fight the Russian Imperial Army across vast battlefields. Movement is more active than in the West, but the Russian army suffers from supply shortages and political chaos. Gallipoli Campaign: British, French, and ANZAC forces land in the Ottoman Empire but withdraw after suffering heavy losses due to Ottoman defense, rugged terrain, disease, and supply issues. Italian Front: Italian and Austrian forces fight fiercely in the Alps and Isonzo regions. Middle Eastern Front: British and Indian forces fight the Ottomans in Mesopotamia and Palestine. Desert heat and lack of drinking water plague the soldiers. Naval War: British and German navies face off in the North Sea. Submarines and naval blockades impact national economies.

■ The Horrors of War Trenches are filled with mud, rainwater, and filth, sometimes reaching thigh-high. Rats and lice teem, and food and water are scarce. Machine guns and artillery barrages block infantry advances, while barbed wire and destroyed terrain make the battlefield even more dangerous. Poison gas attacks lead to the distribution of gas masks, and flamethrowers are used in trench warfare. Tanks appear late in the war but are limited by breakdowns and rough terrain. Wounded soldiers, prisoners of war, the missing and the dead, destroyed villages, and abandoned equipment show the reality of the battlefield. Soldiers suffer from cold, disease, hunger, combat fatigue, and psychological trauma.

■ Internal National Situations The war changes not just armies but entire nations. Germany suffers food shortages due to the British naval blockade, and France's industrial zones are destroyed. Britain faces war costs and conscription issues. In Russia, military defeat, food shortages, and revolution lead to the Tsar's abdication in 1917. Austria-Hungary faces nationalism and the threat of imperial dissolution. The Ottomans struggle to maintain territory and economy while defending multiple fronts.

■ Progress and Rules The timeline follows the outbreak in 1914, Gallipoli and Italian entry in 1915, Verdun and the Somme in 1916, the Russian Revolution and US entry in 1917, and the German Spring Offensive, Allied counterattack, German Revolution, and Armistice in 1918. History may vary depending on the situation. National territories, rulers, economies, diplomacy, military strength, and domestic situations change continuously. Every nation makes independent judgments and goals, and the outcome of the war depends on diplomacy, supplies, industrial power, military strength, and political conditions.