Answer:
World War I (WWI) was a major global conflict that lasted from 1914 to 1918. It involved many of the world's major powers divided into two opposing alliances: the Allied Powers, led by France, Great Britain, and Russia; and the Central Powers, led by Germany, Austria-Hungary, and the Ottoman Empire. Here are some of the important things that happened during WWI:
Assassination of Archduke Franz Ferdinand: On June 28, 1914, Archduke Franz Ferdinand of Austria-Hungary was assassinated by a Serbian nationalist, which set off a chain of events that led to the outbreak of war.
Outbreak of War: On July 28, 1914, Austria-Hungary declared war on Serbia, which then led to other countries entering the conflict. By August 4, 1914, most of the major powers of Europe were at war.
Trench Warfare: During WWI, soldiers fought in long, muddy trenches that stretched across Europe. Trench warfare was characterized by deadly battles, disease, and poor living conditions for soldiers.
New Weapons: WWI saw the introduction of new weapons, such as machine guns, tanks, and poison gas, which made the fighting more deadly and brutal.
US Entry: The United States entered the war on April 6, 1917, after years of trying to remain neutral. Its entry helped to tip the balance in favor of the Allies.
Russian Revolution: In 1917, the Russian Revolution overthrew the Tsarist government and established a communist government led by Vladimir Lenin. This led to Russia's withdrawal from the war and a shift in the balance of power in Europe.
End of the War: The war ended on November 11, 1918, when Germany signed an armistice with the Allies. The Treaty of Versailles, signed in 1919, officially ended the war and imposed heavy penalties on Germany.
Overall, World War I was a devastating conflict that had a profound impact on the world. It led to the deaths of millions of people, changed the political and social landscape of Europe, and set the stage for many of the conflicts that would come in the 20th century.