
Indian and Chinese troops were involved in a violent faceoff on Monday leading to the deaths of 20 Indian soldiers, and if reports are to be believed by US intelligence sources at least 35 Chinese troops were also killed. However, China hasn't confirmed its casualties.
India and Chinese troops were first involved in a low-intensity clash at Pangong lake at Ladakh on May 5, including in Galvan Valley, Daulat Beg Oldi and Demchok in eastern Ladakh along the Line of Actual Control(LAC).

The military face-off between India and China on June 15-16 led to the death of 20 Indian soldiers in action. There have been reports of both countries pulling up heavy arms and ammunition along the Line of Actual Control(LAC) ever since tensions escalated at the border.
However, according to a 1996 agreement between the two sides, both sides are barred from conducting blast operations within 2 km of LAC.
Four soldiers from Assam Rifles were also reportedly killed at Tulung La in Arunachal Pradesh in 1975 during an ambush by Chinese soldiers.

On May 10, the Indian Army had issued a statement confirming a face-off at Naku La along with a clash at Pangong Tso.
Days later there were reports of troop build-up on both sides.

On June 2, India confirmed troop build-up at the LAC even as military commanders of both sides met on June 6 to diffuse tensions at the border.
Indian Army later said that China had begun withdrawing soldiers at the border.

On June 10, Indian and Chinese military commanders met at the Galwan Valley in another round of talks as Indian and Chinese troops continued to be in a confrontational position.
A few days later the Indian Army said Indian and Chinese troops were set to disengage.
Indian and Chinese Army delegations met on June 15 along the LAC at the Galwan Valley, however, on the same evening there were clashes between the two sides leading to the deaths of 20 Indian soldiers.