So I am reviving this tl (it never died) and if you wish to freshen up then re-read previous sections starting at 1-3 (4, is just arguing). I hope to do justice, I have freshened up a little lately and am ready to pursue this again. I hope my English is better however lol. The year is 867 mind you, (Zanj rebellion has already occurred with no battles however).
In the lands to the East, the great Amir Ya'qub ibn Laith al-Saffarid had built after victories against the Zunbil, Ammar ibn Yassar and Abnurseh, gained the title of Muhjahid and the enemy of Jahil. Further, he has gained the support of the common people of Afghanistan and Sistan, he, defending them from the Khawarij of Ammar ibn Yassar and his relatively benevolent rule. As well, he gained the support of the former warriors of Zun, which formed a new wing of his army as Pashtun infantry, who now claimed the titles of Fida'yeen, this coupled with an alliance formed with the powerful general out of Ghazni, the Ayyar Ibn al-Mawsili.
While gaining the alliance with Ibn al-Mawsili, this was perhaps better termed a non aggression pact. Al-Mawsili was with his Ayyar army a remnant of the old Umayyad expansion of Islam past the Sassanid realms. He and his Ayyar Warriors ruled from Ghazni with a relative secular rule, as he and his soldiers cared little for religious differences and saw only the mighty Dinar as its ally and simply taxed its populace and due to this were at peace with the Zunbils through a series of tributes until Ya'qub al-Saffarid conquered them and set up his capital within their land. This thus, prompted al-Mawsili to align with Ya'qub. After all, the Ayyar factions in Ghazni, where seen as pro Umayyad and too autonomous by the previous ruler Muntasir and are viewed with suspicion by Mu'Tazz. Mawsili then signed the pact with Ya'qub at Qandahar, roughly joining the two as the powers of Afghanistan. The two then began deciding the plan for ending resentment in their nearby lands.
Mawsili would begin by suggesting an attack on the various Khawarij strongholds which remained in somewhat power around the tribal lands following the death of Ammar ibn Yassar. The largest of these strongholds was the Khawarij faction led by Rahman al-Salmani in the land of Karukh. Rahman had been a supporter of Ammar ibn Yassar but backed out after Ammar began murdering villagers in Sistan and preferred for himself to remain secluded from the outsiders and rule according to shariah. Previously he had battled Mawsili with victories against him, due to the numbers on his side, as his army could quickly gain power by villagers joining his force in droves. Mawsili with Ya'qub prepared to march upon Karukh in 867.
"Rahman al-Salmani, the enemy of Shaytan and the strong arm of Islam, bids you glad tidings. As you likely have heard, my alliance with the honorable ibn al-Mawsili is strong. We have crossed the land and gained the allegiance of many, our armies are made of zeal and supporters who seek death for the sake of the cause of Allah. We fight the jihad of truth and never transgress, further we are called by the Ummah to bring unity to a disunited land. Thus, we call you to either submit or face us on the fields of battle, to face our array. Remember too, the fate of Ammar ibn Yassar, the apostate, how he was slew for transgressing against the pillar of Sistan. Peace be to you, lest you demand the sword, Allah knows best and you know none." -letter from Ya'qub to Rahman al-Salmani
In response:
"Blessings to Allah and to his righteous followers, the world is his and all witness his glory at every turn. Greetings, O pillar, what great honor you have to send a letter, however bravery is better than honor, the brave and noble would arrive before me to announce an engagement. This is the term of the nobility in the times of old, surely you know this, yet likely, you and your allies have taken too much to the trappings of Fars. However, you, I must say, have at least given class to the thief Mawsili (let me say is name no more), he would ride to battle without a formal letter nor a meal.
In regards to your offer, know this... That I, in my position cannot surrender, for the people trust in me as their guard and I respect them. To allow foreign warriors into my realm, no matter the reputation will destroy my legitimacy. Thus I deny your request of surrender, yet accept the offer of peace, for it is not I who begin the calls of war, but you. I choose the hard road, that of diplomacy, to make such a request as you have made, is to give only the option of blood. Rejection of this is all that can be made, but as Allah demands, we must oppose the measure we recieve with the same and if the sword is given then so too will we rise with swords of fire and arrows of a wave, crash into us you cannot, we will cut a swathe through any who engages us, ask the corners of the earth of our resolve, they quake at our mention.
What a shame to achieve much and die dishonorably on the path of blood."
While impressed by the bravery of Salmani, Ya'qub with Mawsili invaded Karukh. In the battle of Karukh, the Khawarij army made up of battle hardened Muhjahid and village levies made a vicious defense around various teaches built and local fortresses. However the Saffarid army far outnumbering the Khawarij forces, overwhelmed them and captured Salmani after three days of skirmishes. In the negotiations, Salmani surrendered for his people seeking to stop the bloodshed, and demanded to be beheaded, but with the wish that his head not be displayed in Karukh but in Qabdahar as he did not want his people to be disheartened.
Ya'qub, a man of compassion, saw favor upon Rahman al-Salmani and pardoned him, especially after seeing the fierce general at battle. Salmani hesitantly agreed, but after Karukh was rewarded to him as his emirate, he boldly performed Bay'yah to Ya'qub. All this angered the Ayyar al-Mawsili.
As word travelled, great calls were heard across Fars as Ya'qub's fame swelled. The word was that Ya'qub had defeated another Khawarij in alliance with the Ayyars and the people of Bactria were giving him Bay'yah and recanting their allegiance to Mu'Tazz. People from all around were amazed at this, the hope of a new ruler free from the Turks or the Mu'Tazila. In the courts of Baghdad, Mu'Tazz, a young but wise ruler, was worried, even his tutor and virtual father Assad al-Wathiq became fearful for his young ruler, he also doubted the Abbasid military prowess to assert its authority over the new Saffarid power to the east.
Bugha al-Saghir, still famed for his skill, was boldened by the events and called for an invasion of Fars to demand allegiance from Ya'qub. Assad al-Wathiq continued to to preach caution:
"Honorable Amir, Ya'qub's intentions are still unknown and this Bayait he has revived is dubious. We have no evidence that he accepted such Bayait and this could all be here say from a rebellious and wishful people in Fars. As well, let him have such autonomy for now, as we can manipulate him and use him to our needs, let the people of Fars rebel and allow him to quell such enemy."
Mu'Tazz accepts the advice of Assad and calls Bugha to calm himself and not act so brash. Mu'Tazz rightly notes that sending an army to Fars will push Ya'qub to full fledge rebellion, but if left alone, could give his loyalty to us or less favorably be defeated by inner struggles.
While in the south, Dibaj after gaining more allies to his cause, crosses the Dujayl from the plantations and sets up a large camp. From this camp slaves and Bedouin and Khawarij revolutionaries make their way into, using the Dujayl as a defense they prepare for an attack by the local authorities.
Thanks for reading, and I'm excited to continue writing. Any questions or requests can be asked

.