Obviously, I don't want to spoil a lot. That said, the details of an All Region run would differ from, say, Ilex Forest. However, to spell out the basis:
Trainers wake up one day with a news report of "shady characters" in the region with no real descriptions to work off of. Global Police get a little bit more and begin to work gathering information, while Syndicate(s) build up bases and begin to do research on their goals. In the meantime, Trainers can't do much, so they should be training.
As the game goes on, more people will learn more information. The syndicat might make a few attempts to fulfill goals, the police a few attempts to stop the syndicate, and even some assassination attempts (or successes).
After this, a few teams should form up to oppose the syndicates, or at least protect themselves. Others will simply join a syndicate for protection. The Police will begin to receive more powers, and the syndicate will launch major-ish assaults on other syndicates, the police, or certain key areas. As the game begins to drift to late game, almost all spy's and officers are know, and the trainers not tied to syndicates will start forming closer ties now that they can (probably) trust each other. The police will take leadership, and the tides will turn against Syndicates. As the game reaches the final climax, the syndicates will go directly for their target, and the full might of factions will be pushed against each other in all-or-nothing battles. Or not. It all really depends on how the police and commanders do, but I expect that.
Trainers wake up one day with a news report of "shady characters" in the region with no real descriptions to work off of. Global Police get a little bit more and begin to work gathering information, while Syndicate(s) build up bases and begin to do research on their goals. In the meantime, Trainers can't do much, so they should be training.
As the game goes on, more people will learn more information. The syndicat might make a few attempts to fulfill goals, the police a few attempts to stop the syndicate, and even some assassination attempts (or successes).
After this, a few teams should form up to oppose the syndicates, or at least protect themselves. Others will simply join a syndicate for protection. The Police will begin to receive more powers, and the syndicate will launch major-ish assaults on other syndicates, the police, or certain key areas. As the game begins to drift to late game, almost all spy's and officers are know, and the trainers not tied to syndicates will start forming closer ties now that they can (probably) trust each other. The police will take leadership, and the tides will turn against Syndicates. As the game reaches the final climax, the syndicates will go directly for their target, and the full might of factions will be pushed against each other in all-or-nothing battles. Or not. It all really depends on how the police and commanders do, but I expect that.