Ok, so check out the jeep FC set up to drive up & down the railroad rails (1/2 way down page) at
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In WWII (ETO, CBI, MTo and others I am sure) the US Army put special rims on jeeps and used them to pull boxcars around when the real locamotives were all shot up...
Brian
Brian's Military Jeeps of WWII
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Squadron Patches of WWII