Rebels Aiding Backers in their Backers Insurgencies

One interesting and overlooked phenomenon is that many rebel groups often go to the aid of their foreign backers when their backers themselves surfer an insurgency. Some cases of such occurrences is the Justice and Equality Movement (JEM) of Sudan (Darfur more specifically) helping the Sudanese Peoples Liberation Army (SPLA) government in South Sudan fight the Neur White Army and rouge SPLA factions. In Syria, Hezbollah came to the aid of the Assad government against the various insurgent groups. In Sudan, the Sudanese government was aided by various Ugandan insurgent groups like the infamous Lords Resistance Army (LRA), and the more obscure groups like the Uganda National Rescue Front (UNRF) and the Alliance Democratic Forces (ADF), against the SPLA factions and other Sudanese rebel groups (the Ugandan Government also backs the SPLA factions, so the reverse roles has occurred in a Cold War style conflict). The reasons for such interventions is that the Rebel groups will not get their source of backing if the foreign government that is backing them falls to an insurgency. So in order to protect their precious source of backing, those rebel groups intervene in the allied government's insurgency on the side of their backers. This interesting phenomenon should get more attention to academics that study conflict.