As a historian with a focus on the early 20th century, I specialize in the study of the Great War, also known as World War I (WWI). This conflict was a pivotal moment in history, leading to the end of several empires and reshaping the political landscape of the world. The war was characterized by unprecedented levels of industrialization, mechanization, and the introduction of new weapons that changed the face of warfare forever. Step 1: English Answer The end of World War I marked the dissolution of several empires that had been dominant powers in Europe and beyond. Among these, the Ottoman Empire, Austria-Hungary, and the Russian Empire are the most notable. The German Empire also saw its end, but it was more of a transformation into the Weimar Republic rather than a complete dissolution. The Ottoman Empire, which had been in decline for some time, was one of the Central Powers during WWI. After a series of military defeats and the subsequent loss of territory, the empire was partitioned by the victorious Allied powers through a series of treaties, most notably the Treaty of Sèvres. This led to the establishment of modern Turkey under the leadership of Mustafa Kemal Atatürk. The Austro-Hungarian Empire was another multi-ethnic empire that collapsed as a direct result of WWI. Comprised of various nationalities, the empire faced internal strife and nationalist movements even before the war. The war exacerbated these tensions, and its defeat led to the empire's dissolution. The Austro-Hungarian Empire was formally dismantled by the Treaty of Saint-Germain-en-Laye, and it was succeeded by several new states, including Austria, Hungary, and Czechoslovakia. The Russian Empire ended with the Russian Revolution of 1917, which was partially a result of the severe strain that WWI put on the Russian economy and society. The Provisional Government that took over was unstable and faced continued conflict. This culminated in the Bolshevik Revolution, led by Vladimir Lenin, which established the Russian Soviet Federative Socialist Republic, the first state to be based on Marxist principles. While the German Empire did not dissolve in the same manner as the others, it effectively came to an end with the abdication of Kaiser Wilhelm II and the signing of the Treaty of Versailles, which imposed heavy penalties on Germany and led to the establishment of the Weimar Republic. The League of Nations was an international organization formed after WWI with the intention of maintaining world peace. It was established as part of the Treaty of Versailles and was the first of its kind, aiming to prevent future conflicts through diplomacy and cooperation. WWII indeed saw many technological advances that were either developed or significantly improved during WWI. The use of tanks, airplanes, and eventually, gas masks, were all outcomes of the technological race between the warring nations. The horrors of chemical warfare led to the banning of poison gas under the Geneva Protocol in 1925, although this did not prevent its use in subsequent conflicts. Step 2: Divider read more >>

The four empires that collapsed after WW1 Ottoman Empire, Australia-Hungary, German, and Russian. League of nations formed when the central power agreed. WW 2 saw many technological advances from WW1 like tanks and airplanes. Eventually soldiers were given gas masks and at the end of WW1 poisons gas was banned.Feb 6, 2014read more >>