The Great Wall of China was initially created as separated walls to guard their land from invasions by different states just before the unification of China. Just after the Qin Dynasty, it took over the majority of the lands, Emperor Qin Shi Huang first created a number of walls and built the initial Great Wall of China. The wall was established to prevent any invasion attempts and savage attacks by the northern nomadic tribes and dynasties. However, Genghis Khan, a well known leader who united northern nomadic tribes, was able to penetrate the wall and conquer northern China, which spread all over the nation later on. Following the Mongol Empire, China was once more back to the leadership of their countrymen; this time, the Ming Dynasty emerged to be one of the strongest nations throughout the history. The Ming Dynasty revived, reconstruct, and more elongated the Great Wall of China under its 10 year project. They adopted the methods used by Mongols to penetrate the walls. They further extended it to the desert where the nomadic tribes utilized to came from. As opposed to the earlier walls, Ming utilized bricks and stones instead of rammed earth to strengthen it, and devoted on reconstruction and fix of the walls as Mongols continued their attempts. This explains why other individuals claim that the construction in the Great Wall of China was finished in 1644 under the Ming Dynasty.
The Wall was purposely built for the aim of protection. They have been at first developed as barriers between states through the Warring Time period, and later amongst the land of Qin Dynasty and also the northern dynasties. Additionally they tactically served, though confirmed not effective in driving away invaders, to slow down invading attempts to penetrate into the Qin land. Even so, unlike other defense mechanisms of any nation these days, the Great Wall of China expenses no quantity on building. Men that physically contributed to constructing the structure received no volume in hand. They had been forced to labor, establishing the Great Wall during the Qin Dynasty. They had been pushed to work as slaves under the reign of Emperor Qin Shi Huang. It has been said that thousands of workers died in fatigue and starvation, and that their bodies had been buried in the wall. Through the early times, the Great Wall of China justified its purpose of stopping war between dynasties, but not until the Mongol invaders penetrated the wall and invade most of China.
One more renowned penetration in the wall was the identified very first Battle of Shanhai Pass in Shanhaiguan in 1644. This is a decisive battle of Qing over the Ming Dynasty, which signaled the end of the Ming Dynasty and crowned Qing to reign over China, making Qing Dynasty the last dynasty in the history of China. In addition, conflicts again arose within the Great Wall of China amongst Chinese and Japanese soldiers.
Throughout the 20th century, the Great Wall of China had witnessed several bloody battles; one of individuals was the second Battle of the Shanhai Pass. In 1901 at Shanhaiguan, the Chinese 626th regiment of the Northeastern Army met the Japanese 8th division using 4 armored trains and 10 tanks supported by warships of the Imperial Japanese Navy IJN 2nd Fleet with a dozen warships offshore.