China shares a border with 14 countries. From what I can gather, the US has used military force in at least nine of these.
- Afghanistan, 1998, 2001-
- Bhutan
- Democratic People's Republic of Korea (DPRK), 1950-1953
- India, 1942-1945 (1)
- Kazakhstan
- Kyrgyzstan
- Laos, 1962-75
- Mongolia
- Myanmar, 1942-1945 (1)
- Nepal
- Pakistan, 2004-
- Russia, 1918-20, 1920-22
- Tajikistan, 2001 (2)
- Vietnam, 1955-75
I'm not arguing whether the use of force was necessary or not.
