What to do after a war?

It's the end of my first war on Able and I have a few questions. Hope you guys can help. 1) Do we need for the war on Charlie to end before both wars can start again or are the two shards completely independent? 2) how long after the end of a war does the new one begin? What does the wait depend on? 3) will the map be exactly the same or will there be some differences? (Buildings layout, terrain, resources and so on) 4) is there any point in gathering supplies in preparation for the next war or will everything be reset to the same value regardless?

Thanks