No pictures this week, I have however finally got around to uploading a couple of John D. Salts compendiums of WW2 Operations Research documents. One on weapons effectiveness, the other on artillery.
The former is fascinating as it includes contemporary analysis of the suppressive effects of various weights of small arms and artillery fire against different types of targets, among other things. They are both on the 'downloads page', but here are the direct links.
WW2 Weapons Effectiveness