historical and geographical region in present-day Iran, Afghanistan and Pakistan

Sīstān (Persian: سیستان‎) is a border region in eastern Iran (Sistan and Baluchestan Province) and southern Afghanistan (Nimroz, Kandahar and Zabul provinces).

The gates of Haozdar, in Sistan

Sistan was once the homeland of Sakas, a Scythian tribe of Iranic origin. The Saffarids, one of the early Iranian dynasties of the Islamic era, were first from Sistan.