Taken from Steve Zaloga's The Sherman at War, "Patton's Third Army decided to initiate a program of uparmoring M4s with armor plate taken from knocked out American and German tanks as an alternative to the ineffective use of sandbags."
It's raining outside right now so I had to take the pics on the deck instead of my usual deckrail!! I still have to weather it and load it up with all the crap that US tankers like to store!!
EDIT: Replaced the original pic with one back on the deckrail!!
