The forum search has always been tricky at this website not because of its functionality, but because of vague topic titles and valuable discussions being lost in the massive threads that reside within group builds. Discussion you thought might have been in the armor forum might have taken place in group builds, increasing the need to search beyond this forum.
I wish there was a way to "tag" a topic within the armor forum as "modern", "WW2", "early" or "general" or something along those lines. It might make searching for a particular post easier.