After finally having enough time to sit down and play through a map to the modern age, I"ve come to a solid conclusion: The Jeep must be nerfed. I couldn't figure out how a handful of Jeeps were managing to take on a very heft defended city full of Infantry. Then I check the stats. Holy Crap!
-Requires Machine Tools, and Oil Products/Rubber
-262 Production/Hammers/Whatever
-22 Strengh
-3 Movement
-Can Withdraw (10% starting)
-25% Attack bonus vs Machine GUns
-200% bonus vs Archers
-100% bonus vs Mounted units
-200% bonus vs Melee
-Flank bonus vs Siege
-Starts with Blitz
And since it wasn't explicitly mentioned, I'll go ahead and state it so everyone is aware, they also receive full defensive bonuses.
All of these put together, their 22 strength (which exceeds Infantry at 20, matches armored cars at 22, and nearly reaches the level of early and light tanks at 28), withdraw chance,
3 movement & Blitz (which the AI enjoys using to great effect via bunches of kamikaze jeeps

), and able to use defensive bonuses all add up to make them extremely overpowered with little to stand in their way in the industrial-modern era (especially if used in large numbers, as the AI is wont to do) except, well, other Jeeps, and then only if you have lots of them.
Zap, these have got to be nerfed...
