The Great Opponent of Muhammad Become His Followers

Sakhr ibn Harb as known as Abu Sufyan commonly was a leader of Quraish of Mecca and stauch opponent of Muhammad before adopting Islam later of life. He born 560 CE as son of Harb ibn Umayya. He has connected with Muhammad through his great-grandfather, Abd Shams ibn Abd Manaf, brother of Hashim, great-grandfather of Muhammad. He married with Hind bint Utbah and have relationship with Soffiya bint Abi al-A'as, later well known as Ummu Habibah. He involved many battles against Muhammad; Battle of Uhud and Battle of Ahzab. He also involved in Consquest Muslim of Mecca that later on he and almost all of Quraish people adopted to Islam.
Then he fought as Muhammad lieutenant's in the subsequents of war. He was in charge in Najran after Muhammad died. He also involved in Battle of Yarmouk; against Roman Byzantine. He died at ninety years old in Medina, during Uthman period.

http://en.wikipedia.org/wiki/Abu_Sufian