Willow Palisade

Willow Palisade (柳條邊) was a system of ditches and embankments planted with willows intended to restrict movement into Manchuria, built by the Qing Dynasty during the later 17th century.

Manchuria borders Mongolia in the west, Siberia in the north, China proper to the south and North Korea in the southeast. Inner Manchuria has access to the Yellow Sea and the Bohai Sea to the south, while Outer Manchuria has access to the Sea of Japan and the Sea of Okhotsk to the east and northeast.

To the south, Manchuria was separated from China proper by the Inner Willow Palisade, which restricted the movement of the Han Chinese into Manchuria during the Qing dynasty, as the area was off-limits to the Han until the Qing started colonizing the area with them later on in the dynasty's rule. The Manchu area was separated from modern-day Inner Mongolia by the Outer Willow Palisade, which kept the Manchu and the Mongols in the area separate.

References

Elliott, Mark C. "The Limits of Tartary: Manchuria in Imperial and National Geographies." "Journal of Asian Studies" 59, no. 3 (2000): 603-46.