WORLD CIVILIZATION

Detailed explanation-1: -Constructed under the command of Achaemenid King Darius I in the 5th Century BC it connected major cities from Susa, South West Iran, to Sardis, modern-day Manisa.

Detailed explanation-2: -The Persians invented the windmill c. 500 CE, although, it should be noted, this is the first recorded mention and the devices were probably in use earlier. Windmills were used in pumping water and grinding grain. They were made of reeds woven together into paddles which were then fixed to a central axis.