- Oct 2013
But Marjusi, that kind of defense was used for centuries starting with the second Mongol invasion, mainly against OE and Golden Horde, and it worked!How do you feed these people? A relatively small band of cavalry can wreck the countryside while your forces are pined down, how much food stock can you have for not just your city but now your refugees? 6 month? A year? People will be clamoring for you to fight the foreign invaders, and your political legitimacy will be at risk. That's why a lot of battles take place, not because militarily it make sense but it must be done for political reasons.
Logistic simply doesn't support your idea. Only cities standing with river running through them could likely withstand these kind of investments. Otherwise they would be starved to submission.
You abandoned the countryside to them, you won't have much of a militia left.