Banu Qurayza after his victory over the Meccans in the Battle of Badr, Banu Qaynuqa threatened Muhammad's political position and assaulted a Muslim woman which led to their expulsion from Medina for breaking the peace treaty of Constitution of Medina. The Qurayza remained passive during the whole Qaynuqa affair, apparently because the Qaynuqa were historically allied with the Khazraj, while the Qurayza were the allies of the Aws. Soon afterwards, Muhammad came into conflict with the Banu Nadir. He had one of the Banu Nadir's chiefs, the poet Ka'b ibn al-Ashraf, assassinated and after the Battle of Uhud accused the tribe of
Abu Sufyan ibn Harb to intercept it. The Muslim contingent failed to intercept the caravan. They arrived after the caravan had already passed by Medina. Abu Sufyan had learned of the Muslims' plan from scouts he had deployed, and in response, sent a crier to Mecca to rally the Quraysh to arms against the Muslims. The Muslims ended up engaging this Meccan army, a force of around 1000 men, at the plains of Badr several days after they had failed to intercept the caravan. This conflict, the Battle of Badr, ultimately resulted in a Muslim victory. The death of most Quraysh leaders in the