I posing a thread that covers Naval Guns:
* Intermediate size (I'm arbitrarily picking 20mm to 175mm)
* International - US, Britain, Japan, Germany, France, Italy, etc. (CryHavoc101 had a great British thread a while back)
* From the start of WW1 to the end of WW2
* Most importantly - why were those particular sizes chosen. What were their virtues, what were their limitations?
For example: Why did the US more or less standardize on 3" & 5" guns for DE's & DD's (as well as being secondary armament on bigger ships)? Why not 4" or 6" guns? What were the technical virutes of the Bofors 40mm gun that led to near universal acceptance in WW2?
Fire away!