In Madinah the Prophet (PBUH) was able to work freely in spreading Islam. The followers of Islam increased day after day. But the threat by the Makkans did not stop. A few physical confrontations with the Makkans were ensued. Sometimes the battles were won by the Muslims, and sometimes by the Makkans. The Prophet (PBUH) also engaged in battles with the Byzantine and Persian powers that were jeopardizing the existence of Islam from the north and the east. But confrontation with the Makkans stopped for a while after the treaty of Hudaibiyah had been signed between the Muslims and the unbeliever Makkans.
During the Madinah period, the Muslims also established treaties with the Jews of Madinah and the tribes around the city. The Jews broke the treaty, which led to their expulsion out of the Arabian peninsula.
In Madinah, the Prophet (PBUH) succeeded in establishing Islam as a way of life in its true meaning. He was not only giving guidance on purely religious matters such as salat (prayers), zakat (almsgiving), Saum (fasting) and Hajj (pilgrimage) and examples in these matters, and also provided Muslims with rules and laws covering social, economic, political fields.
Emissaries Entertained in Madinah
It was in Madinah that the Prophet (PBUH) received envoys and emissaries from various tribes and nationals, asking matters of various sorts, demanding dialogues, negotiations etc. Among the emissaries were an envoy representing the Christian community in Najran (South Arabia). The Prophet (PBUH) welcomed them, entertained them as honoured guests and even allowed them to conduct their religious service in his city.
It was a good occasion to share each other's views on matters of religion. Some members of the envoy were deeply impressed by the treatment they received from the Muslims, thus leading them to embrace Islam.
Liberation of Makkah
The treaty of Hudaibiyah gave the Muslims a big opportunity to exemplify the true Islam in personal conduct and in relations with peoples and communities. But the peace did not stay long due to the attitude of the Makkan tribal chiefs who broke the treaty. Soon the Prophet (PBUH) marched very quietly to Makkah in the 8th year of the Hijrah (emigration) to Madinah. The Makkans gave no resistance and by the whole city surrendered to the Prophet (PBUH). He announced a general amnesty for all his enemies and treated all citizens of the city with generosity. A verse of the Qur'an was revealed on the occasion:
[ When the help of Allah and victory comes, and you see the people enter the religion of Allah in crowds. So glorify the Name of your Lord and beg His forgiveness. He, verily accept repentance.] (Qur'an 110: 1-3)
After the liberation of Makkah all the remaining hostile tribes in Arabia began to realize the reality of Islamic faith. People had seen the noble teachings of Islam. Good examples of forgiveness, tolerance, justice, fairness, steadfastness and other qualities as exemplified by the Prophet (PBUH) and his companions had left an impression in the hearts of hundreds of thousands of people who became Muslims.