Janab Rafi Bhai,
Muslims of Madinah were very constrained defending 82 aggressions from the Makkans from 1-7 Al-Hijra (in 6 years). Even then Muslims in small groups were mobilizing to help any Makkan believers wanting to emigrate.
The Truce of Hudaibiyah in 6 AH was a great facilitator for free mobility between Makkah and Madinah. Allah called it AL-FATH.
THE ULTIMATE VICTORY
In the 6th year of Hijrah (June 628 CE), a truce was signed between the Muslims of Madinah and the non-believers of Makkah. This truce was called the Treaty of Hudaibiyah. Although the treaty, in detail, was apparently unfavorable for the Muslims, the exalted Prophet accepted it. This truce proved to be a blessing for Muslims and Islam. The people of Makkah and Madinah started meeting freely. Everyone could see and experience the truth and beauty of Islam established as a System of Life. More and more people kept embracing Islam.