When islam began, arabia was sort of a buffer state between two powerful empires of the time. what were they? byzantine and sasanian roman and persian byzantine and roman sasanian and persian

I am pretty sure it is the Byzantine and persia

He worked his way up from a printing apprentice to becoming one of the wealthiest men of the colonies. He was a prolific writer and a selfless inventor (none of his inventions were patented). He was one of the key contributors and leaders of the American Revolution. His diplomacy was essential to America's victory.