It's a good kernel for a set of adventures. I like the ideas both of having to find fuel to gas up the Abrams and then take them somewhere to find ammo to make them actually useful. Could easily lead to a couple of nice missions.
Alternatively, the tankers could require infantry support to travel as they are worried about being capped by AT they have no way to counter. Players need to make their way to the location (with or without a couple of stopgap HEAT rounds) and then run point as the M-1s make their way back to friendly "lines".
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