Short answers, pulled from the story.
The name Atil likely derives from a Finno-Ugric word meaning river. This linguistic root connects to the region between rivers inhabited by early Hungarians, recorded by Byzantine emperor Constantine VII in the term Atelkuzu.
Svyatoslav I of Kiev sacked Atil during 968 or 969 CE marking a violent end to its dominance. The eastern campaign of Prince Svyatoslav captured the White Tower while defeating the Khazar Khaganate forces.
Atil stood along the Volga delta at the northwestern corner of the Caspian Sea following the Second Arab-Khazar War. The city consisted of three parts separated by the flowing waters of the Volga with palaces on an island connected by a pontoon bridge.
Modern Turkic languages still retain historical names for the Volga such as İdel in Tatar and Atăl in Chuvash. Some researchers once linked the name to the Mongolian word khanbaliqh but this theory fails due to language differences between Khazar and Mongolian groups.
As of 2024, archaeological remains of Atil remain positively unidentified despite decades of searching. An accepted hypothesis states they were washed away by rising levels of the Caspian Sea over centuries.