1. 1967: Nathu La and Cho La Clashes
The scuffle started after Chinese troops infiltrated into the Sikkim-side of the border. The skirmishes lasted for over two months.
Casualties: Approx 200 Indian & 300 Chinese Soldiers
2. 1987: Arunachal Standoff
India granted statehood to Arunachal Pradesh in 1986. The Chinese government proceeded to protest. The Chinese army crossed LAC and entered the Sumdorong Chu Valley and started building helipads. Skirmishes occurred when the Indian troops refused to stand down. After initial posturing, India and China decided to de-escalate their deployments.
3. 2017: Doklam
Doklam is located at the India-Bhutan-China trijunction. In June 2017, Chinese troops attempted to construct a road near Doklam plateau, in a territory claimed by both China and Bhutan. Indian troops stepped in as the territory lay close to an Indian highway. The Standoff lasted 72 days.
4. 2021-21: Ladakh Standoff (Ongoing)
Hundreds of soldiers have been ranged against each other in the remote snow desert of Ladakh since April 2020 in the most serious border flare-ups for years. It all began after Chinese patrols advanced into the Indian side of the borer.