Bismillah hir rahmanir raheem
Assalamualaikum my wonderful brothers and sisters! How are you all? Hope you're doing well inshallah! Allhamduillah my week went great! How about urs?
Battles in Islam
It has already been mentioned that the envoy sent to the Ghassanid prince of Busra had been killed en route at the hands of Shurahbil, a feudatory of the Byzantine emperor. In order to exact reparations, the Prophet, on his return to Medina after the pilgrimage, sent a force of 3,000 men with an order to go to the place where the envoy (Harith ibn 'Umayr al-Azdi) had been killed.
The Holy Prophet gave to Zaid ibn Harithah the command of the army, saying, "If Zaid is killed, then Jatar ibn Abi Talib will be the commander, and if he, too, is killed, then 'Abdullah ibn Rawahah will command the army. And if he is killed, then the Muslims should select someone as their commander."
Hearing it, a Jew said: "If he is a true Prophet, none of these three will remain alive." Before dispatching this expedition, he instructed them as follows:
Many servants of God will be busy worshipping Him in their places of worship (churches). Do not touch them.
Do not lift your hand against any woman (to strike her).
Do not kill any child or minor boy.
Do not kill any old person.
Do not destroy any green tree.
These instructions imparted in an age when hardly any scruples were exercised during bloody engagements indicate the depth of the Prophet's compassion and the efforts he was exerting to effect reforms in all walks of life.
The Muslim force marched under the command of Zaid ibn Harithah to Mu'ta in Syria. In order to meet it, the Syrians had raised a huge army. Although far outnumbered, the Muslim force gave a heroic account of its valor, but the disparity in number was too great. When its commander, Zaid, was slain, the command was taken over by Ja'far ibn Abi Talib, a cousin of the Holy Prophet. He, too, was killed and 'Abdullah ibn Rawahah, took the command. When, as prophesied by the Holy Prophet, he, too, was martyred, the command went to Khalid ibn al-Walid who was able to bring about a successful retreat.
The Holy Prophet was much grieved by the death of Zaid and Ja'far. About Ja'far, whose hands were both severed before he fell down, the Holy Prophet said that Allah had given him two wings of emerald in place of his arms whereby he flies in the Garden with the angels. That is why Ja'far is known as at-Tayyar (the flyer).
Source: www.al-islam.org