Cao 2025 Personalist Rebel Sponsorship

A regime type in which power is concentrated in a single leader who dominates both the military and party (if any), with weak formal institutions and no independent elite power bases. Operationalized as: (1) binary indicator from GWF typology (Geddes, Wright & Frantz 2014) distinguishing personalist from all other regime types including democracies; (2) continuous latent personalism index 0-1 (Geddes, Wright & Frantz 2018) covering 118 authoritarian regimes 1946-2010.

Direct military intervention by a sponsor state in a civil conflict, involving deployment of troops to fight alongside rebel forces against the target government. Represents the highest level of sponsor involvement and provides direct control over the conflict process. Coded 2 in the NAGs support typology (vs. 1 for material/logistical support, 0 for no support). Predicted probability: ~2% for non-personalist targets, ~6.6% for personalist targets (230% increase).

Any form of external state support provided to rebel groups in civil conflicts, including material resources (weapons, financing), logistical support (safe haven, training camps, transport), and direct combat support. Emergence of sponsorship is not predicted by personalism (H2); only the type of sponsorship varies.

The degree to which a leader faces meaningful checks from domestic political elites, military officers, or party structures that limit unilateral foreign policy decisions. High under institutionalized regimes (party-based, military junta, monarchy); minimal under personalist rule where other elites lack independent power bases to challenge the leader.

The battlefield capacity of state armed forces, including command coordination, tactical competence, and ability to generate intelligence and civilian cooperation. Systematically reduced under personalist regimes due to coup-proofing strategies. Acts as partial mediator between personalism and combat support: weaker target militaries lower the cost and risk of sponsor troop intervention.

Strategies adopted by authoritarian leaders to neutralize military threats to their rule: creating parallel security forces with conflicting jurisdictions, frequent purges of senior officers, loyalty-based promotions over competence, restricting inter-unit coordination, and appointing ethnic/family loyalists to command positions. Effective at reducing coup risk but systematically degrades military cohesion and battlefield effectiveness.

A persistent, militarized dispute relationship between two states characterized by repeated conflicts, mutual threat perception, and ongoing competition. Operationalized as binary indicator from Goertz, Diehl & Balas (2016) peace and rivalry dataset. Strong positive predictor of both general rebel sponsorship emergence and combat support provision. Sponsoring rebels is an indirect, lower-cost strategy for rivals to weaken each other.

The degree to which the target state is excluded from international economic, diplomatic, and military networks. Personalist regimes tend toward greater isolation due to limited trade openness, fewer stable alliances, and repressive practices that draw international condemnation. Reduces the reputational cost for sponsors of directly intervening in the target's civil conflict.

Strategic rivalry between a would-be supporter and a NAG's target increases the probability of state-NAG support by ~298% compared to non-rival dyads (binary logit, all dyads, Table 3 baseline model). In strategic rivalry dyads alone, support probability baseline is 12.4%.

Rivalry duration increases NAG support probability by ~204% over its full range in strategic rivalries (Table 3, Model III); longer-standing rivalries show substantially higher support rates, consistent with accumulated frustration and entrenched preferences for indirect confrontation.

Frustration games (dissatisfied + weak) increase NAG support probability by ~106% and opportunity games (dissatisfied + capable but constrained) by ~159% relative to non-game baseline in voluntary support sample (Table 3, Model II), confirming that both types of strategic dissatisfaction drive NAG cooperation.

State-NAG cooperation significantly increases the probability of MID initiation by the target against the supporter (coeff 1.441**, p<0.05, Table 4, Model I), indicating that NAG sponsorship as a rivalry management strategy is escalatory rather than substitutive.

Higher capability ratio (supporter/target) reduces NAG support probability by ~52% (all dyads, Table 3), while formal alliances reduce support by ~16-41%. Trade ties and joint democracy also suppress support, indicating that institutional interdependence substitutes for indirect confrontation.

External state support (binary) for rebel groups significantly increases one-sided civilian violence (nbreg coeff on 'support', Table 1 Model 1, clustered on dyad), consistent with the moral hazard hypothesis: funded rebels reduce efforts to maintain civilian cooperation.

Democratic sponsors (democ_supdum) significantly reduce the positive effect of external support on civilian abuse (Table 1 Model 2), supporting the principal-agent moderation hypothesis: democratic principals impose human rights conditionality that constrains rebel agency slack.

Human rights organization secretariat presence in sponsor states (hrosecretariat_sum) significantly reduces rebel civilian abuse (Table 3 Models 1-2), extending the democratic accountability argument: principled lobbying by civil society actors moderates sponsor permissiveness toward rebel atrocities.

80% of all intrastate conflicts (1975-2017) saw at least one instance of external support (Table II). External support is structurally ubiquitous in modern armed conflict, making the absence of support a more analytically interesting condition than its presence.

Post-9/11 shift: rebel-sided external support nearly disappeared by 2016 while government-sided support reached 77% of all active conflict-dyads by 2017 (Figure 4). The Global War on Terror reframed rebel support as state sponsorship of terrorism, raising reputational costs of backing non-state groups.

Training and expertise is the most common support type overall (Figure 1); rebels and governments receive systematically different support: governments receive more troops and joint operations, rebels receive more weapons and training. Non-state-to-non-state support (rebel groups supporting other rebel groups) accounts for more than 25% of all rebel support.

Interstate rivalry between sponsor and target state decreases orchestration probability by 8.4 percentage points (coeff -0.999***, z=-2.872, Model 1), supporting the saliency thesis that high-stakes rivalry pushes sponsors toward hands-on delegation to enforce rebel compliance.

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