I agree that having 3 defensive units based here is entirely unnecessary at this stage of the game. It will take 17 turns to build a caravan with 3 units, and 13 to build with only 2 units. We need to rehome the surplus unit elsewhere. As you may have guessed, I think we need all the caravans we can get together at this particular point in the game. These wonders often make all the difference and as we already have Mike's then we have made a good start, but we will still need Cop's and Newton's, Leo's and Adam Smith's, along with JSB's and Sun Tzu's if these are felt necessary.