What happened on this land around c. 500–600 CE?

Sasanian zenith followed by strategic overreach and internal fragility leading into the period of Arab-Muslim expansion.
Rulers
Sasanian Empire
224–651 CE
Sasanian authority still dominant until mid-7th century.
Battles
Final Byzantine–Sasanian campaigns
622–628 CE
Large-scale campaigns that temporarily extended Sasanian control but drained resources.