There are really only three rules in Clan Wars. They are obey the mods, be appropriate, and respect other players. Now each will be explained:

Obey the mods. Their word is law, so just obey. If they decide that what someone wants to post is unreasonable or innapropriate, they can delete it.

Be appropriate. Don't cuss or use offensive language. Don't spam or advertize, and don't be innapropriate. Its as simple as that. Just don't be offensive or crude. Also, try and use correct grammar and punctuation.

Respect other players. Be respectful and don't just negate everything another player does. If you and them are in a fight and they swing at you, don't necesarily always parry or dodge. Maybe take a blow and get hurt, then run away. Be more realistic, it allows some very interesting story possibilities to appear. Also, don't go up to a character and post, "Sos and so approaches so and so and stabs him in the heart, slaying him instantly." Instead say, "So and so approaches so and so and lunges with his sword, aiming for the heart." Allow the other character time. If something goes on for to long in a stalled position then the mods will work it out. So, just be respectful and realistic.