Prophet Muhammad (sallallahu alaihi wa sallam) part 34 :

Prophet Muhammad (sallallahu alaihi wa sallam) part 34 :

A) Retribution(penalty) for the Murder of the Muslim envoy (representative) :

When the Prophet(ﷺ) and his followers returned to Medina, they arranged in expedition to exact retribution from the Ghassanite prince who had killed the Muslim envoy. A force of three thousand men, under the Prophet's(ﷺ) adopted son Zaid, was sent to take compensation from the offending tribe. Khalid Ibn Al-Walid(radhi Allahu anhu) was one of the generals chosen for the expedition. When they reached the neighborhood of Muta, a village to the southeast of the Dead Sea, they met with an overwhelming force of Arabs and Romans who were assembled to oppose them. The Muslims, however, resolved firmly to push forward. Their courage was of no avail and they suffered great losses.

In this battle Zaid and Ja'far(radhi Allahu anham), a cousin of the Prophet(ﷺ), and several other notables were killed. Khalid Ibn Al-Walid, by a series of operations, succeeded in drawing off the army and conducting it without further loses to Medina. A month later, however, Amr Ibn Al-' As marched unopposed through the lands of the hostile tribes, received their submission, and restored the prestige of Islam on the Syrian frontier.

B) Quraish violate terms of Hudaibiya, Prophet's(ﷺ) army march against Idolators :

About the end of the seventh year of the hijrah, the Quraish and their allies, the Bani Bakr,violated the terms of the peace concluded at Hudaibiya by attacking the Bani Khuzaah, who were in alliance with the Muslims. The Bani Khuzzah appealed to the Prophet for help and protection.The Prophet(ﷺ) determined to make a stop to the reign of injustice and oppression, which had lasted so long at Mecca. He(ﷺ) immediately gathered ten thousand men to march against the idolaters and set out on January, 630.

After eight days the Muslims army halted, and arrived at Marr Az-Zahran, a day's journey from Mecca. On the night of their arrival, Abu Sufyan, who was delegated by the Quraish to ask the Prophet(ﷺ) to abandon his project, presented himself and besought an interview. In the morning it was granted. "Has the time not come, O Abu Sufyan," said the Prophet(ﷺ), "for you to acknowledge that there is no deity save Allah and that I am His Messenger?" Abu Sufyan, after hesitating for awhile, pronounced the prescribed formula of belief and adopted Islam. He was then sent back to prepare the city for the Prophet's(ﷺ) approach.

With the exception of a slight resistance by certain groups headed by Ikrima and Safwan, in which many Muslims were killed, the Prophet(ﷺ) entered Mecca almost unopposed. The city which had treated him so cruelly, driven him and his faithful band for refuge among strangers, the city which had sworn his life and the lives of his devoted adherents, now lay at his(ﷺ) mercy. His old persecutors were now completely at his feet. The Prophet(ﷺ) entered Mecca on his favorite camel Al Kaswa, having Usama Ibn Zaid(radhi Allahu anhu) sitting behind him. On his way he(ﷺ) recited Surah Al Fath (Victory), the first verses of which maybe interpreted thus:
"Verily! We have given you (O Muhammad) a manifest victory. That Allah may forgive you your sins of the past and future, and complete His Favor on you, and guide you on the Straight Path; and that Allah may help you with strong help. (Surah Al-Fath 48:1-3 Quran)

In sha Allah, will be continued. {Ref : Stories of Prophets By Ibn Kathir(rahimahullah) }