The Siachen conflict, sometimes referred to as the Siachen War, is a military conflict between India and Pakistan over the disputed Siachen Glacier region in Kashmir. A cease-fire went into effect in 2003. The contentious area is about 900 square miles (2,300 km2) to nearly 1,000 square miles (2,600 km2) of territory. The conflict began in 1984 with India's successful Operation Meghdoot during which it gained control over all of the Siachen Glacier (unoccupied and undemarcated area). India has established control over all of the 70 kilometres (43 mi) long Siachen Glacier and all of its tributary glaciers, as well as the three main passes of the Saltoro Ridge immediately west of the glacier—Sia La, Bilafond La, and Gyong La. Pakistan controls the glacial valleys immediately west of the Salt