Having a total area of at least 1,000 square miles?
The Ancient Persians invented their own alphabet, the wind-power machine and Qantas, a water irrigation system. They also developed their own coinage system.The ancient Persian leaders worked hard to ensure their empire succeeded.
The Persian Empire was important for many reasons. ... The Persians developed their empire in a manner that future empires would emulate. The Persians created a mail system. They built roads and developed a communication system throughout their empire.
Great Britain and the Soviet Union later on received lend-lease aid. <span />
"natural resources" "natural resources" and a thriving "labor force" would all be factors. It should also be noted that the textile industry was already doing well.