Soviet winter camouflage trials ended #OTD in 1941. The result was the famous "tire track" camo that blended together at long range, creating gray tones that blurred the tank's outline even when only white paint was available. #tanks #History #WW2 #WWII

Soviet winter camouflage trials ended #OTD in 1941. The result was the famous "tire track" camo that blended together at long range, creating gray tones that blurred the tank's outline even when only white paint was available. #tanks #History #WW2 #WWII

The 7,5 cm Pak 40/4 auf RSO (Sf) was a desperate attempt to meet the demand for tank destroyers. Hitler personally inspected and approved a prototype #OTD in 1943, but the troops that had to use it in combat were not nearly as fond of it. #tanks #history #WW2 #WWII

The 7,5 cm Pak 40/4 auf RSO (Sf) was a desperate attempt to meet the demand for tank destroyers. Hitler personally inspected and approved a prototype #OTD in 1943, but the troops that had to use it in combat were not nearly as fond of it. #tanks #history #WW2 #WWII

The 7,5 cm Pak 40/4 auf RSO (Sf) was a desperate attempt to meet the demand for tank destroyers. Hitler personally inspected and approved a prototype #OTD in 1943, but the troops that had to use it in combat were not nearly as fond of it. #tanks #history #WW2 #WWII

A test TOG turret was shot up #OTD in 1941 to determine the best methods of joining thick armour with bolts. None proved satisfactory, as even a nonpenetrating hit from 2-pounder shot could destroy the bolts. The plates also cracked under 6-pdr fire. #tanks #history #WW2 #WWII

A test TOG turret was shot up #OTD in 1941 to determine the best methods of joining thick armour with bolts. None proved satisfactory, as even a nonpenetrating hit from 2-pounder shot could destroy the bolts. The plates also cracked under 6-pdr fire. #tanks #history #WW2 #WWII

Installation of the D-25T gun into the IS-2 tank prototype was completed #OTD in 1943. The rear machine gun was removed at first, as there was a concern that there would not be enough room in the tank to operate the gun with it present. #tanks #history #WW2 #WWII

Installation of the D-25T gun into the IS-2 tank prototype was completed #OTD in 1943. The rear machine gun was removed at first, as there was a concern that there would not be enough room in the tank to operate the gun with it present. #tanks #history #WW2 #WWII

Installation of the D-25T gun into the IS-2 tank prototype was completed #OTD in 1943. The rear machine gun was removed at first, as there was a concern that there would not be enough room in the tank to operate the gun with it present. #tanks #history #WW2 #WWII