Suplimental armor is always interesting. Patton hated sandbags and chewed out TCs for using it...Makes sense, as it really didn't do much other than add a lot of weight to the already underpowered Sherman engines. Russians= bedsprings...yeah, no one gave them up...Russians just took what they wanted. Plywood from material supply boxes seemed to have helped against magnetic mines and may have helped with AT rockets...but not certain if Japan had any at that time.

I Korea, a Turkish unit with M-46s West of us had problems with grenades being lobbed at the tanks and they were reported to have lost a tank that way. They had cages welded around the turrets with chicken wire...may have been effective, but those poor guys really had a tough time getting in and out of the tanks.

Lots of Shermans had brackets welded to allow wood planks or sandbags to be fitted to the sides. Helped against shaped charge rounds as Panzerfaust and other AT rockets, but didn't help against a Panther or Tiger's main gun. Anything helps, even the sheet metal Schützen on Panzer sides did the trick against bazookas.

Build a weapon, make something to kill it...make a bigger weapon, make something bigger to kill it...never stops..