Wedge strategies in diplomacy are used to prevent, divide, and weaken an adversary coalition.[1][2] Wedge strategies can take the shape of reward-based or coercive-based.[3] Alignment abnormalities can arise because of wedge strategies.[4]
Wedge strategies may be a subset or similar to Divide and rule strategies, however, there may be a slight optical difference. With the divide and rule strategy, there is a clear winner, whereas with the wedge strategy, attention is not focused on the winner but instead against the discredited coalition.
US examples
1948: George Kennan argued that the United States should "wean a Chinese coalition government from the Soviets"[5]
1952 CIA's national covert strategy objective "should be to drive a wedge between the Communist government of China and the Communist government of the USSR to the point where hostilities actually break out or are on the constant verge of breaking out...so that they are no longer a menace to the West and to their Asiatic neighbors."[6]
Great Britain examples
1930s: Great Britain's defensive attempts to accommodate Italy[7]
1940–1941: Great Britain used a wedge strategy to keep Spain from entering World War II on the side of the Axis[4]
Soviet examples
1950: Moscow inciting Mao to actions guaranteed to sustain Sino-American friction[8]
^Sheng Hao Chai, Tommy (2020). "How China attempts to drive a wedge in the U.S.-Australia alliance". Australian Journal of International Affairs. 74 (5): 511–531. doi:10.1080/10357718.2020.1721432.
^Meijer, Hugo (2022). Awakening to China's Rise. Oxford. pp. 179–180, 236–237.
^Joo Yoo, Hyon (January–March 2015). "China's Friendly Offensive Toward Japan in the 1950s: The Theory of Wedge Strategies and International Relations". Asian Perspective. 39 (1): 1–26. doi:10.1353/apr.2015.0007.
^ abcHuang, Yuxing (Summer 2020). "An Interdependence Theory of Wedge Strategies". The Chinese Journal of International Politics. 13 (2): 253–286. doi:10.1093/cjip/poaa004.
^Thompson, Mark R.; Batalla, Eric Vincent C., eds. (2018). Routledge Handbook of the Contemporary Philippines. Routledge. p. 176. ISBN9780367580827.
^Lim, Sojin; Alsford, Niki J.P., eds. (2018). Routledge Handbook of Contemporary South Korea. Routledge. pp. 312–325. ISBN9781032052175.
^Chun, Jayhun; Ku, Yangmo (Summer 2020). "Clashing Geostrategic Choices in East Asia, 2009-2015: Re-balancing, Wedge Strategy, and Hedging". The Korean Journal of International Studies. 18 (1): 253–286. doi:10.1093/cjip/poaa004.
^Vu, Khang (2023). "External Coercion, Internal Accommodation: China's Wedge Strategies Towards the Vietnam-United States Partnership, 2013–2022". Journal of Contemporary China: 1–21. doi:10.1080/10670564.2023.2228718.