Bleach has only showed us a small majority of the squads purpose and I cannot assume that the rest of they are not specialized to some degree and can at least function as both a regular standing army and their specific field.

So in this thread think of what kind of job each squad could be for those that don't already have one and what you base this on.

1st: Basically just the leading squad
2nd: The squad that focuses more on hand-to-hand combat than Zanpakutos
Don't really know the others, but I think that there's some kinda stealth squad and a tactics squad in there. Hitsugaya's squad is probably the one that distracts the enemy. A cute little kid and a huge breasted chick? What other use can there be?

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Glados is a bitch. She made me kill the companion cube, the only friend I'll ever have. :cry:

Chibidoro-sama=Neko-freak

2nd is more about stealth, interrogation and maybe about info gathering and sending as well. from soifon's henchmen's uniforms, you can take their job as similar as ninjas.

4th are healers, obviously.

11th are the more physical brutes.

12 are the science department. R&D and all that.

personally, i see 13 being a place where most newbies start out. well balanced fighters, but not exactly powerful. remember, byakuya did more or less limited rukia's position without having her ever becoming a captain or vice captain or anything close, so more likely than not, he might as well have had place her there. IF this is true, than it only points out that the 13th squads handles the more simple and less dangerous missions.

aside from that, i'm sure one of the squads should be pros at kido techniques.

as for the others, you can take a look at each squads insignia and their meaning and take a guess: http://en.wikipedia.org/wiki/Shinigami_%28Bleach%29#Special_fo rces