Han Great Wall. Wall with Han lookout tower.
2nd c BCE Chinese Han Architecture
HAN DYNASTY Anonymous
(active 206 BCE - 220 CE)
c. 140 BCE-120 BCE
2nd c BCE
Dunhuang (near). Gansu. China.
Emperor Han Wudi ordered the contruction of the Great Wall in 140 BCE to keep out the Mongols and Huns who constantly raided the oases within the Western Region.Portions of the wall continued to be built along the Hexi corridor and into Jiuquan City and the Yumenguan Pass in Gansu Province. Altogether Han Wudi built a denfense wall 261 miles long over 20 years. Additional sections were added by later emperors to secure the Western Regions. The wall was integrated with watch towers and military garrisons for soldiers created a continuous system within line of sight. Mirrors and signal fires were used for communications. The soldiers of the garrisons grew their own food and were self-supporting.