Answer:
The signing of the Treaty of Versailles.
Explanation:
The Treaty of Versailles was signed on June 28, 1919 in Paris, France, between Germany and the allies of World War I. Thus, through the signing of this treaty the war was ended, signing a peace in which Germany assumed the responsibilities of the war, constituting itself as the cause of the conflict and forcing itself to repair the damages caused to the victorious nations. This treaty was the formalization of the end of the war, which had ended a year ago with the ceasefire agreed by the parties.
The language spoken most often in Azerbaijan and Farsi (the language spoken in Iran) are considered to the origin of Indo-European languages. However, the Indo-European languages are considered to be a family of several hundred languages and dialects which are all related. There are said to be around 445 Indo-European languages with 313 of them part of the Indo-Iranian branch alone.