First Perso-Turkic War:
http://en.wikipedia.org/wiki/First_Perso-Turkic_War
Second Perso-Turkic War:
http://en.wikipedia.org/wiki/Second_Perso-Turkic_War
these also answers a question one had asked here. why turkic tribes didn't migrate to middle east before islam
Sassanid-Ethiopean war:
http://en.wikipedia.org/wiki/Vahriz
Vahriz conquered Yemen with 700 prisoners
http://books.google.co.uk/books?id=p...%20war&f=false