[Andrew_nenakhov]

Rather expensive. The walls must be keep repaired and strong, a moat must be filled with water, a forest must be cleared up to a distance of a trebuchet shot, the locker must have enough food supplies. Fail to do any of this, and an eventual siege will end in a disaster.

And of course you'll need a retinue to man the walls.

[hodgesrm]

Though as Dumas shows through countless examples in his works the retinue of defenders need not be large if they are very doughty. [1] The works of Goscinny and Underzo also explored the proposition that the defenders might further increase their advantage through judicious use of technology. [2]

[1] https://en.wikipedia.org/wiki/The_Three_Musketeers#Plot_summ...

[2] https://en.wikipedia.org/wiki/Asterix

[mkl]

*Uderzo

I always misread it as Underzo when I was a kid though.

[hodgesrm]

Same here. There's probably space here for an off-topic thread on words we misread/mispronounced as kids and how long it went on. In my case it's about 45 years.