- World War Two
- US (lend-lease aid to the USSR)
- M4A1(76)W - upgraded with 76mm M1 gun and 47° glacis with large drivers' hatches
- Wet (W) means ammunition stowage was moved to the hull floor, with water jackets surrounding each stowage bin. Wet stowage reduced the chance of fire after a hit to about 15%
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