When did the Slavs appear in Eastern Europe? What peoples and tribes did they meet there?

In this territory, the ancient Slavs appeared in the distant 4th century. At that time, these lands were inhabited by Germanic tribes, Baltic tribes, etc. In the period from the 6th to the 8th century, the settlement of the Slavic tribes took place. So the Eastern Slavs occupied the lands of Eastern Europe. The Western Slavs settled in the central regions of Europe, while the South Slavs occupied the Balkan Peninsula.