This is exactly the way it will be. If you have a very good defendable position on top of a mountain with cliffs all around it you may stand a chance at defending it. Anything less will fail. This has been known for centuries past.
If I disappear from a discussion please forgive me. My 24-7 business requires me to split mid-sentence to serve them. I am not ducking out, I will be back later to catch up.