Consolidation of power in Transoxiana and Khorasan

Map of Khorasan and its surrounding regions

Ismail was active to the north and east, steadily spreading Samanid influence as well as solidifying his control over other areas including Kirman, Sistan and Kabul.^[9] Ismail was successful in establishing economic and commercial development and organized a powerful army.^[10] It was said that he made his capital Bukhara into one of Islam's most glorious cities,^[11] as Ismail attracted scholars, artists, and doctors of law into the region.^[12] The first translation of the Qur'an into Persian was completed during Samanid rule. Sunni theology greatly cultivated during Ismail's reign, as numerous mosques and madrassas were built.^[13]

In 893, Ismail took the city of Talas, the capital of the Karluk Turks, taking large numbers of slaves and livestock. In addition, a Nestorian church was converted into a mosque.^[14] He also brought an end to the Principality of Ushrusana, extending Samanid control over the Syr Darya river.^[15] Ismail and other Samanid rulers propagated Islam amongst the inhabitants and as many as 30,000 tents of Turks came to profess Islam. During his reign he subjugated numerous regional states to the east, directly incorporating some within his boundaries and retaining the local rulers of others as vassals. Khwarezm to the north was partitioned; the southern part remained autonomous under its Afrighid rulers, while the northern part was governed by a Samanid official. Another campaign in 903 further secured the Samanid boundaries. These campaigns kept the heart of his state safe from Turkish raids, and allowed Muslim missionaries to expand their activities in the region.

Even after his brother Nasr's death, Ismail's rule in Bukhara was not formally recognized by the caliph at that point. As a result, the Saffarid ruler 'Amr-i Laith himself asked the caliph for the investiture of Transoxiana. The caliph, Al-Mu'tadid, however, sent Ismail a letter urging him to fight Amr-i Laith and the Saffarids whom the caliph considered usurpers. According to the letter, the caliph stated that he prayed for Ismail, who the caliph considered the rightful ruler of Khorasan.^[16] The letter had a profound effect on Ismail, as he was determined to oppose the Saffarids.

The two sides fought in Balkh, northern Afghanistan during the spring of 900. During battle, Ismail was significantly outnumbered as he came out with 20,000 horsemen against Amr's 70,000-strong cavalry.^[17] Ismail's horsemen were ill-equipped with most having wooden stirrups while some had no shields or lances. Amr-i Laith's cavalry on the other hand, were fully equipped with weapons and armor. Despite fierce fighting, Amr was captured as some of his troops switched sides and joined Ismail.^[18] Ismail wished to ransom him to the Saffarids, but they refused, so he sent 'Amr to the caliph, who blamed 'Amr's conduct^[19] in the matter and then invested Ismail with Khorasan, Tabaristan, Ray, and Isfahan.

Conquest of northern Iran

Map of northern Iran

Ismail decided to take advantage of the caliph's grant by sending an army to Tabaristan, which was then controlled by the Zaydids under Muhammad ibn Zayd. Muhammad and his army met the Samanid army under Muhammad ibn Harun al-Sarakhsi at Gurgan, and in the ensuing battle, the Samanids prevailed, and the severely wounded Muhammad was captured. He died on the next day, 3 October 900 (or in August, according to Abu'l-Faraj).^[20][21][22] His corpse was decapitated, and his head was sent to Ismail at the Samanid court at Bukhara.

As Muhammad's son and designated heir Zayd was also captured and sent to Bukhara, the Zaydid leaders agreed to name Zayd's infant son al-Mahdi as their ruler, but dissension broke out among their ranks: one of them proclaimed himself for the Abbasids instead, and his troops attacked and massacred the Zaydid supporters. Instead, the Samanids took over the province.^[21] The Samanid conquest brought along a restoration of Sunni Islam in the province.

However, Ismail's general Muhammad ibn Harun shortly revolted, forcing Ismail to send an army under his son Ahmad Samani and cousin Abu'l-Abbas Abdullah into northern Persia in 901, including Tabaristan, forcing Muhammad to flee to Daylam. The Samanid army also managed to conquer several other cities including Ray and Qazvin, though subsequent rulers lost the territory to the Daylamites and Kurds.^[15] Ismail then appointed his cousin Abu'l-Abbas Abdullah as the governor of Tabaristan.

Although Ismail continued to send gifts to the caliph, as was customary, he neither paid tribute or taxes. For all intents and purposes he was an independent ruler, although he never took any title higher than that of amir.

Death

After a long sickness Ismail died on 24 November 907^[23] and was succeeded by his son Ahmad Samani. Ismail gave enormous amounts of booty and riches to others, and kept nothing.^[24]