Bratok... 3 stages now? Sounds good to me!
Scarlino:
Last summer we had to dig the ol‘ trneches for SQ, and my fireteam partner and I never got past Stage 1, the shell scrape.
I wish I could tell you exactly what the other stages were, but we were only briefly shown what proper trenches looked like on a particularly hot and uncomfortable day, so I wasn‘t really paying attention.
Basically, though, you just keep digging until you can stand up. The later stages add overhead protection (OHP), firing steps, grenade sumps, etc. I honestly don‘t think a grenade sump will save you, however. It is my belief that if you are stuck in a trench in the modern age of warfare, you‘re as good as dead.