Doc Lap Hill was one of the two French Strongholds of the Northern Zone protecting the Hedgehog from the north. 

Him Lam Hills are a group of three hills one next to another located 2-3km to the northeast of Dien Bien Phu City center (or The French Commander Post during the Dien Bien Phu Battle). During the Dien Bien Phu Battle Him Lam (or Beatrice) was the most-fortified and strongest French post in Dien Bien Phu which protected the Hedgehog from the northeast.

The French started attacking Vietnam in 1857 and managed to invade Sai Gon, southern Vietnam in 1858. From 1858 to 1865, the French marched northward and gradually invaded all of Vietnam. Along with its neighbors Laos and Cambodia, Vietnam was put into a French colony called Indochina.

Ban Keo Hill, which included Anne-Marie 1,2,3,4 strong-points, protected the French Dien Bien Phu Hedgehog from the northwest. Anne-Marie 1,2 are on a hill called Ban Keo in Vietnamese, and the other two are on paddy fields right on the northern edge of the Muong Thanh Airfield.

A1 Hill (Eliane 2) belonged to the Eliane Group protecting the French Hedgehog at Dien Bien Phu from the east. 

C1 Hill (Eliane 1) belonged to the Eliane Group protecting the French Hedgehog at Dien Bien Phu from the east. Eliane 1 was located 1.2km slightly to the northeast of the French Commander Post.

D1 Hill (Dominique 2) belonged to the Dominique Group protecting the French Hedgehog at Dien Bien Phu from the northeast. Dominique 2 was the highest of the hills protecting the eastern flank of the French Hedehog at Dien Bien Phu.

E1 Hill (Dominique 1) belonged to the Dominique Group protecting the French Hedgehog at Dien Bien Phu from the northeast. 

The Battle of Dien Bien Phu helped the Vietnamese to gain independence to half of the country. The Battle of Dien Bien Phu was an inspiration to other countries which had been under control of colonialism that they could fight off colonialism to gain back independence to their own country and people.

Dien Bien Phu is the capital city of Dien Bien Province in the Northwest of Vietnam. Dien Bien Phu was the combat site of the Dien Bien Phu Battle which helped to change the course of the World History in the 20th century.

The Muong Thanh Valley is the biggest valley in the Northwest of Vietnam on an averaged elevation of 400m above sea level. The valley runs for 20km from the north to the south. And the width of the valley is about 6-8km.