Imperial China
The Great Wall of China (traditional Chinese: 萬里長城; simplified Chinese: 万里长城; pinyin: Wànlǐ Chángchéng) is a series of fortifications made of stone, brick, tamped earth, wood, and other materials. It was generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe.
The origins of the Great Wall date back to the Spring and Autumn Period (771–476 BCE) of the Eastern Zhou Dynasty. During this era, numerous small walls were built by the individual Chinese states as defensive measures against each other. The period was marked by the rise of powerful warlords and the establishment of large armies, necessitating the construction of fortifications.
The Warring States Period (475–221 BCE) saw the construction of even more extensive fortifications. This period followed the Spring and Autumn Period and was characterized by the constant warfare among seven dominant states (Qin, Qi, Chu, Yan, Han, Zhao, and Wei). The walls built during this time were the precursors to the Great Wall, which aimed to protect states against invasions from rival states and nomadic tribes from the north.
The initial walls were constructed using mostly tamped earth and wood, materials that were locally available. These early walls were built by various Chinese states, each fortifying its own territory against invaders. The state of Qi constructed the earliest walls, known as the Great Wall of Qi, which still exists in some parts today.
The first Emperor of a unified China, Qin Shi Huang, who founded the Qin Dynasty (221–206 BCE), is credited with linking the various state walls into a single system. The Qin Dynasty's effort was primarily to defend against the Xiongnu tribes from the north. This early version of the Great Wall was made by connecting existing walls and constructing new sections. Unfortunately, much of these early constructions have not survived.
The most visible and well-preserved sections of the Great Wall seen today were built during the Ming Dynasty (1368–1644). After suffering a significant defeat by the Oirats at the Battle of Tumu Fortress, the Ming rulers undertook an extensive campaign to rebuild and extend the wall into what is now recognized as the Great Wall of China. The Ming walls were constructed of stronger materials such as stone and bricks, and featured advanced designs like watchtowers, troop barracks, garrison stations, and signaling capabilities through smoke and fire.
The Great Wall served several purposes: