Invade the World, Invite the World is a novel twist on very a very old dynamic.
The classical historical pattern is, A invades B; B is defeated and there is a large exodus away from the conquest; some power from C hires the wandering B-men as mercenaries in a local power struggle; the B-men are enfeoffed in reward, or seize power themselves; the B-men then settle down in C and invite relatives and allied clans to their new region. — This pattern appears with the Anglo-Saxons who fled the Norman Conquest, joined the Varangian Guard, and were settled in Anatolia; the Wells who fled the Anglo-Saxons, and were invited by Magnus Maximus to fight for him in Gaul; and, far earlier, the Galatians invited into Anatolia by some minor diadoche.
The modern innovation is to invade a region yourself, and then use the same refugees you created as a militia against your own countrymen.
(In this connection remember Moldbug’s definition of a militia: capable of monopolizing violence against the civilian population, yet incapable of resisting a modern army.)