The Ming dynasty was established after the expulsion of the Yuan, and early northern defense relied heavily on passes, garrisons, and beacon towers rather than continuous masonry walls—setting the institutional foundations for later Ming Great Wall construction and manning.
A major western strongpoint, Jiayu Pass was built around 1372 as a frontier fortress anchoring defenses at the Hexi Corridor—later integrated into the Ming Great Wall system and garrisoned to control movement along this strategic route.
In 1381, Ming forces under Xu Da repaired and fortified the Shanhai Pass area, strengthening the key “sea-to-mountains” choke point linking wall defenses to the Bohai coast and supporting enduring garrison operations there.
Wall-building in Liaodong Town marked an early, large Ming move toward continuous frontier barriers: major construction is documented from 1437 to 1442, creating long defensive lines to protect the Liaodong agricultural heartland and key routes.
The Tumu Crisis (1449) shocked Ming strategic planning and is widely associated with intensified attention to frontier defense, contributing to later expansions and upgrades of wall-and-garrison systems near key approaches to the capital.
Ming records (including the Ming Shilu) document construction of a “border wall” reaching the Yalu River area; Hushan’s wall is dated to 1479, reflecting expanding fortified lines and garrisoning in the northeast against Jurchen raids.
In 1550, Mongol leader Altan Khan crossed gaps in the Great Wall and threatened Beijing, burning suburbs and exposing weaknesses in the capital-region defense system—prompting major reinforcements and construction campaigns afterward.
Construction in the Jizhou (Ji) defensive sector—covering critical stretches from Shanhai Pass toward Juyong Pass—is dated as beginning in 1551, initiating major upgrades of the wall network protecting approaches to Beijing.
After coastal service, Qi Jiguang (with Tan Lun) was reassigned to bolster the Ji–Chang defense commands, driving systematic repair and modernization of wall defenses near the capital region and expanding permanent garrison infrastructure.
A major Ming innovation was the large-scale construction of hollow brick watchtowers along the wall in the Ji–Chang / Shanhai-to-Changping region, with about 1,200 towers built from 1569 to 1571, improving signaling, storage, and troop shelter.
In 1571, the Ming court reached a peace arrangement with Altan Khan (often associated with the Longqing era), granting titles and enabling regulated border markets; the resulting stabilization reduced incentives for large-scale raiding and altered frontier garrison priorities.
In the winter of 1572, Qi Jiguang led a month-long exercise involving over 100,000 troops, reflecting the scale of Ming garrison forces supporting Great Wall defense; he later codified lessons in training writings used by subsequent commanders.
As Manchu incursions intensified from around 1600, the Great Wall system—especially the heavily fortified Shanhai Pass—became pivotal in holding back entry into North China even after Ming positions in Liaodong deteriorated.
By the early 17th century, frontier pressures contributed to extensive repairs; research synthesizing historical and spatial data reports that Liaodong Town repaired about 1,050 km in 1608, one of the largest documented Ming repair efforts.
On 22 May 1644, Ming commander Wu Sangui opened the gates at Shanhai Pass to Qing forces under Dorgon during the struggle against Li Zicheng, enabling Qing entry through the Great Wall defenses and reshaping control of North China.
With Beijing’s capture and regime collapse in 1644, the Ming state that financed and staffed the Great Wall’s massive garrison-and-repair apparatus ended; the Qing inherited key passes (notably Shanhai) under a transformed strategic frontier.
Great Wall Construction, Repairs and Garrisons under the Ming (1368–1644)
