There has been no full-scale war between China and India since 1962. After the war, there were three regional wars in which casualties occurred: 1967, 1975, and 2020. Unlike the incident in 1975, which was lulled with only Indian casualties, the conflicts escalated into engagements between the two countries due to counterattacks by the Indian army in 1967 and 2020. If so, can the three incidents be considered regional wars of the same scale? What factors cause these differences? This study focuses on the three level of analysis to examine the factors attributable to India's choice of escalation in the conflict between India and China.