There were settlements in prehistoric times near modern Sjondif; these camps date from 5th-1st millennia BC. The last settlement was still inhabited, when the explorer Kuldinkane from Itemmasse tribe first visited the region in 542 BC, and subsequently the Itemmasses conquered the plateau. It is hypothetized that the Dordui, as which the Itemmasses named the local inhabitants, were related to the Yunnavans.
A fortification (Leine Sionemerei) was established by the Itemmasses before 320 BC and a town started to grow around it. The southern indigenous tribes finally succeeded to conquer the region back in 4 AD, and they held it until the 9th century.
Finally, in 1227, Ferrine succeeded in conquering the northern part of the plateau. Shortly thereafter, Habkhea conquered the southern part. During the second millennium the area was often in the middle of conflicts. The last conflict related to the sovereignty over the area was from 1822 to 1826 AD.
Meanwhile, the town grew steadily, having over 200,000 inhabitants in 1950. Highways and railways were built, and the city got a rapid transit system in 1990. Shortly thereafter the economy of the town was ruined. Other countries nearby, Japile and Bexhas, were engaged in a war, which ended the foreign trade to southern direction. Bexhasi and Japilean missiles, which regularly landed in extreme southern Ardenjost, where also an important feature, which made much of the wealthy part of the population go away. Instead of the rich people, there were lots of legal and illegal immigrants and poor Ardenjostan population. The problem was solved when the war ended in 2006, and the economy is flourishing again.
The Sjondif metro consists of two lines.
Sjondif is surrounded by the following municipalities: Uhumac, Abint, Stalav, Igemoukes and Marieskes.
Sjondif is divided into six statistical areas, and further into 70 districts.