Peter, the long brown object on the T-34 is not a log, but is actually a family sized Slim-Jim. They were used as Hamster bait on the Eastern Front. I can see how you would be confused though.
And the gun you say is a 75mm arty piece is actually a British 6 Pounder, I believe. I base that on recollections of the Tamiya modelling catalogue from when I was a kid, so I could be wrong.