The Prophet Muhammad died in the year 632. In the next hundred years Islam spread east, west and north to become the largest empire the world had known.
From Arabia Muslim armies marched north into what is now Iraq, Iran and Syria.
They marched east to Afghanistan and northern India.
They marched west to take over the whole of North Africa. They took control of most of Spain and marched into France.
Why did Islam spread so quickly between 632 and 732?
