I have refrained from commenting and rechecked the photo several times …. the U-boot Kommandant is Graham Fordham isn’t it? The clincher is that he is waving his pistol distractedly at one of his own crew :O)
Although this isn't about any particular period, scale or set of rules, I mainly use 15mm scale, and for WW2, play PBI company level, or NQM or Megablitz operational level games. My regular circle of enthusiasts also enjoy Russian Civil War and Post War 'semi historical' (AK47 'classic').
I find the Not Quite Mechanised period of the late 30's - where horse transport meshed with armoured vehicles - more fascinating than Late War armour (so apologise in advance to 'SS Panzer-fanciers') ...
Modelling is very important: if it's worth doing, it's worth doing well.