Origins of the Sino-Indian War

A long series of events triggered the Sino-Indian War in 1962. According to John W. Garver, Chinese perceptions about the Indian designs for Tibet, and the failure to demarcate a common border between China and India (including the Indian Forward Policy) were important in China's decision to fight a war with India.

Source: Wikipedia — Origins of the Sino-Indian War (CC BY-SA 4.0)