The Tactics of Insurgent Groups in the Republic of Chechnya
Written by a Russian colonel and translated by the Foreign Military Studies Office at Fort Leavenworth. Some comments:
When estimating the composition and numbers of the insurgent groups, their reserves must also be considered. These are sympathetic groups of the populace who have permanent places of residence and are outwardly law-abiding citizens but who almost always have hidden weapons caches. Former members of the insurgent groups may also belong to the reserve. These are people who, during disarmament programs, voluntarily refused to support the insurgents, laid down their arms, and gained legal status. From time to time, these two types of reserves merge into active rebel detachments to take part in large-scale actions. They also perform intelligence work and spread disinformation among the forces of order...
Baron von Steuben falls under the next item.
insurgent groups also include mercenaries and volunteers from other regions and from abroad. The mercenaries are the best-trained and most combat-ready fighters and are utilized for the most difficult missions that require a high degree of competence. They also work as advisors for detachment commanders and as instructors at training centers. They may be combined into separate detachments (or comprise their core) that are used for specific combat involving terror and special actions.
Which raises, of course, an interesting question. Assume for a moment that there is open civil insurrection in the United States. What dispersal of foreign fighters might one find in, say, Dearborn v. Laredo?
Might make the basis for an interesting story.