After the conquest of Mecca, hundreds of thousands of Arabs came to the prophet to convert and pledge their allegiance. This lecture covers why they joined now and reflects the verses of Surah An-Nasr which predicted this.
The Prophet also sent various small expiditions to the surrounding tribes to invite them to Islam.
The last of the pagan tribes decided to attack the Muslims in a final stand, setting the stage for the Battle of Hunayn.
Lecture notes available at http://www.why-quran.org/?p=695.
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Video recording of this lecture + Q&A available on YouTube at https://www.youtube.com/watch?v=7QDkg3-SzFg&list=PLpkB0iwLgfTat-Pgh4W3WFmupPamiC9UT.