Peace treaties depend on the number of stars that an attacker achieves against you and what percentage of destruction they achieve. During a peace treaty, you can not be attacked or revenged by other players. If you attack (or even look for a battle) you break the peace treaty. So you should not attack during peace treaty.
|% of Castle Lost||Keep Destroyed||Keep NOT Destroyed|
|0-34%||1 star, 8 hour Peace Treaty||0 star, 1 hour Peace Treaty|
|35-49%||1 star, 8 hour Peace Treaty||0 star, 3 hour Peace Treaty|
|50-99%||2 star, 10 hour Peace Treaty||1 star, 8 hour Peace Treaty|
|100%||3 star, 12 hour Peace Treaty||N/A|
The duration of peace treaties is effected by researching Diplomacy at the Cathedral. Below is a breakdown of how long the various treaty lengths are based on the level of your Diplomacy.
|No Diplomacy||Level 1||Level 2||Level 3||Level 4|
|1h||1h 9m||1h 12m||1h 15m||1h 18m|
|3h||3h 27m||3h 36m||3h 45m||3h 54m|
|8h||9h 12m||9h 36m||10h||10h 24m|
|10h||11h 30m||12h||12h 30m||13h|
|12h||13h 48m||14h 24m||15h||15h 36m|