[1] Recognizing the weakness of Timurid authority in Herat, Jahan Shah of Kara Koyunlu invaded & took the city on June 28, 1458, which was then occupied by Ibrahim Mirza's father Ala al-Dawla Mirza.

After Jahan Shah had taken Herat, he was in a tough position and unable to keep it due to pressures from within his kingdom of Kara Koyunlu plus the increasing threat from Uzun Hasan of Aq Qoyunlu.

[2] While leaving the territory, however, the Turkmens ravaged Khurasan and when Abu Sa'id Mirza arrived to take Herat the people were frightened.

[1] So in order to ease their fears, he sent back the major portion of his army towards Bukhara.

[citation needed] When Abu Sa'id Mirza received intelligence of this advance, he set out to meet this threat head on despite being numerically outnumbered and sent for reinforcements.