Why might one government support insurgents in a rival country?

A government may support insurgents in a rival country as a strategic instrument of foreign policy to exert pressure, influence outcomes, or undermine an opponent’s interests without engaging in direct, traditional warfare.12

In the context of political science and civil war, this practice is often referred to as a proxy war. Governments choose this path for several key reasons:

• Strategic Advantage: By backing nonstate combatants, a state can weaken a rival’s power base, destabilize its government, or limit its regional influence at a lower cost than a full-scale military invasion.13
• Avoiding Direct Conflict: Supporting insurgents allows major powers to compete for influence while avoiding the risks of direct confrontation, which, particularly in the nuclear age, carries the threat of catastrophic escalation.1
• Exploiting Existing Tensions: Governments may exacerbate internal social, ethnic, or religious divisions within a rival state to destroy the existing social order and deprive the incumbent government of its power base.3
• Overcoming Resource Scarcity: For insurgents, foreign aid—such as weapons, training, and sanctuary—is often critical for survival, allowing them to sustain a protracted struggle that imposes ruinous costs on the target government.32

While this strategy is a common tool in international relations, it carries significant moral risks, including the potential to facilitate dictatorships, widen local conflicts, and cause widespread humanitarian devastation.1