Which battlefield is highest battlefield in the world?

Question

Which railway has the highest line in South America and the second highest in the world, second only to the one which connects Qinghai in China and Lhasa in Tibet?

Answer 1

Life at the highest battlefield in the world, Siachen is a cold war at its coldest
The miraculous survival of the jawan and the incident itself, has generated a debate on the tough conditions close to 3000- 4000 men belonging to three battalions served under at the highest battlefield in the world.

Answer 2

Siachen Glacier