What happened on this land around c. 900–1000 CE?

Flourishing Persian culture and literature; decentralisation compared with early Abbasid period; local dynasts consolidate territories.
Rulers
Samanids, Buyids and other local dynasties
9th–11th centuries CE
Regional dynasties assert control across Iran and neighboring zones; Shi'a Buyids briefly control Baghdad.
Battles
Regional conflicts among Persian dynasties
10th century
Regional conflicts among Persian dynasties