What year is known as the end of World War I?

The year that is recognized as the end of World War I is 1918. This year is significant because it marks the signing of the armistice on November 11, which effectively ceased hostilities on the Western Front. The formal end to the war was later established with the Treaty of Versailles, signed in 1919; however, the active fighting concluded in 1918. This pivotal year saw a culmination of battles and political decisions that ultimately led to the armistice, making it a key date in military and world history.

The other years mentioned do not represent the conclusion of World War I. For example, 1916 and 1917 are significant for various battles and developments in the war but are prior to its end. Therefore, 1918 is the correct answer as it directly relates to the cessation of combat and the transition towards peace negotiations.