 Returning to Sistan, he forced Abu'l-Husayn Tahir to retreat.As soon as Khalaf's army had been dismissed, however, Abu'l-Husayn Tahir returned, forcing Khalaf to seek Samanid help again.The conflict suddenly ended with the death of Abu'l Husayn Tahir in 970; his son Husayn declared his allegiance to the Samanids and left Sistan for the time being.