What explains the range of nonvictorious outcomes experienced by rebel groups in civil wars? Varying combinations of two structural factors produce different types of rebel groups, whose organizational configurations predict their outcomes. These factors are the external resources provided by cross-border support networks found within regional state systems, and the status reversal grievances produced by the politics of fragmented authority in weak states. Insurgent types are then associated with a given level politico-military effectiveness and a corresponding fate. Eight Ugandan insurgencies illustrate variation in outcomes across groups within a context of contentious domestic and regional politics that controls for the state, regime, and time period.