In the 17th and 18th centuries, the road was only a track, impassable even with ponies. Goods, mainly
pashmina wool, were carried by porters from
Yarkand and
Tibet for the
Kashmir shawl industry. In the 19th century, under the
Dogra rule after
Zorawar Singh annexed Ladakh, the route was improved, allowing pony caravans to pass. In 1870, under Maharaja
Ranbir Singh of
Jammu and Kashmir, a treaty was signed with
British Raj, whereby the Jammu and Kashmir state undertook to maintain the road up to the Central Asian border (possibly the
Karakoram Pass), allocating annual funds for the purpose. The road came to be known as the "Treaty Road" During the 1950s, tensions rose in Ladakh region. China secretly built a military road spanning some from
Xinjiang to western Tibet, which was discovered by Indian in 1957 and confirmed by Chinese maps showing the road in 1958. The political situation eroded, culminating in 1962 in the
Sino-Indian War. The road on the Chinese side gave
PLA an advantage as a reliable supply line, giving the
Indian Army impetus to build a road for supply and mobilisation of their own troops. The building started from Sringar in 1962, reaching
Kargil in two years. This was the basis of modern Srinagar-Leh Highway. Building the road was hazardous task, given the challenging geographical location, and maintaining the road is still an unenviable task. Restrictions on civilian traffic were lifted in 1974. This highway was used as mobilisation route by the Indian Army during
Pakistani occupation of Kargil in 1999, known as
Operation Vijay. ==Gallery==