How many times should Damage Protection rules be written? Tell you what. It's one of the fundamentals of the game and surprisingly enough is that it's not even in the game. So we need to educate everyone about this. I still have an in-depth guide about Damage Protection in the forums but it's pretty bland and full of words and not all people like wall of texts. So here are the basic rules of Damage Protection in a Nutshell.
Damage protection is when you can't attack a base because it has been attacked or damaged greatly. I'm pretty sure you have already encounter damage protection except if you haven't really attack in the game all that much. Enough talk and lets get started.
Damage Protection on Main Yards
If you get attacked 4 times in one hour then you get 1 hour Damage Protection
If you get attacked 10 times in one day then you get 48 hours of Damage Protection
If your base gets damaged from 35% to 54.99% then you get 18 Hours of Damage Protection
If your base gets damaged from 55% to 100% then you get 36 hours of Damage Protection
Damage Protection on Outposts (MR2)
For a newly acquired outpost you get 12 hours of Damage Protection
You can attack unlimited times if it doesn't go above 25% damage but when it does go above 25% damage you only have 2 attacks left before it gets 8 hours Damage Protection
Damage Protection on Outposts (MR3)
If you're in the new world map (Resource Outposts, Strongholds and Defender Cells) then there is no damage protection on outposts. Although a building will be auto-repaired to 25% after every attack.
Conclusion
If you want to know about all the rules of Damage Protection then you can go visit my thread in the forums. If you have any questions please post on the comments below.