stylistic:style_transfer, linguistic:voice_change
Ya'qūb ibn al-Layth al-Saffār, was a coppersmith and the founder of the Saffarid dynasty of Sistan, with its capital at Zaranj. Under his military leadership, he conquered much of the eastern portions of Greater Iran consisting of modern-day Iran, Afghanistan, Turkmenistan, Uzbekistan, Tajikistan as well as portions of western Pakistan and a small part of Iraq. He was succeeded by his brother, Amr ibn al-Layth.