The battle began when Utbah Ibn Rabi-ah his son Al-Waleed...
The battle began when Utbah Ibn Rabi-ah his son Al-Waleed and his pother Sheibah (all from Omayad) stood in front of their pagan army and asked the Prophet to send to them their equals for a duel. Hundreds of companions were around him and many of them were expecting to be called upon by the Prophet but he chose to start with his own family. The load was heavy and the heavy load could be carried only by the people to whom it belonged.
He called upon Ali Al-Hamzah and Obeidah Ibn Al-Harith (all from the clan of the Prophet) to face the three warriors. Ali destroyed Al-Waleed and Al-Hamzah killed Utbah; then they both assisted Obeidah against his opponent Sheibah. Sheibah died immediately and Obeidah was the first martyr at this battle. He died after he lost his leg. When the general offensive began hundreds of companions participated in the battle. They offered sacrifices and pleased their Lord.
But the members of the House of the Messenger distinguished themselves. Ali's endeavor was unique at this battle. When Hanthala Ibn Abu Sufyan faced him Ali liquified his eyes with one blow from his sword. He annihilated Al-Auss Ibn Sa-eed and met Tuaima Ibn Oday and transfixed him with his spear saying: "You shall not dispute with us in God after today.". The Messenger took a handful of gravel when the battle was extremely heated.
He threw it at the faces of the pagans saying: "May your faces be disfigured. God terrify their hearts and invalidate their feet." The pagans ran away turning their faces to no one. The Muslims went on killing them and taking prisoners. Seventy pagans met their death and the Muslims took from them seventy prisoners. History preserved in its records only fifty of the names out of the seventy pagan losses. Twenty 2 or twenty-two 3 of them died at Ali's hands.
This battle laid the foundation of the Islamic State and made out of the Muslims a force to be reckoned with by the dwellers of the Arabic Peninsula. However we should not overlook the fact that it took three hundred and twelve companions to achieve sixty percent of the outcome of the battle while Ali alone achieved at least forty percent of it. It is not an exaggeration to say that his endeavor was a very substantial factor in pinging the battle to its victorious conclusion.
Should we subtract his forty percent the outcome of the battle might have changed. On the other hand if we subtract any other single companion in that battle the outcome of the battle would not have changed .