Somme Trench help

[Cecilia_Rosewood]

The proper category for this question would probably be the ‘Hosted Games’ category, and there’s already a question and answer thread about Somme Trench. You can find it here:

Somme Trench Questions

So I’ve played the game since beta and I love it but i was wondering a few things. Firstly, how many different roles are there? As in gunner, sniper etc and how do you become them? And how do you get promoted? I managed to get to sergeant in the beta but couldnt get past corporal in this release. Finally, how do you get captured as a Pow? Thanks!