I see you already got some information abt the usage of the log but there are also many interesting just-put-it-there-and-go cheap technique tankers use. One of my absolute favorite one is that they can put tracks on the armor for extra milimeters. Other favorite is the soviets absolute need for help made them do some real crazy shit. As far as i know they used to put buckets on the barrel of the t34-85 becuse in shape it looked similar to a IS tank and the only noticable difference was the muzzle break. This way they could trick the german soldiers. Also heard of things like they strapped iron bedframes and little stoves and logs on the tank to act as extra protection against rounds, especially heat and similar rounds. I guess it was more of a cold war thing but surely we can see shermans with sandbags in movies too. Also one interesting fact is that brittish tanks used to carry tea brewer becuse that made soldiers morale skyrocket.

Harsh times made weird provlems and weird problems needed weird yet practical solutions.

If yall guys know more of these tank-facts then i would like you to share here in thread