A new feature with the name Clan Wars has been introduced to the Clash of Clans and Supercell has fully explained the entire process and other details. A clan war is nothing but a battle entirely based on strategy between two clans. In involves a course of two days, the first being the preparation day and then the battle day. The clan that wins is awarded with a large loot bonus and apart from this every member of the clan who succeeds in making attacks during a war is also rewarded with some bonus loot.
Only leaders and co-leaders can initiate a clan war. Once it has been initiated, the game automatically searches for an opponent with similar strength. The attacking power (Heroes, spells, troops and army camp capacity) and the defensive (heroes, traps, buildings and walls) determine the strength of a clan and not the number of trophies won by a clan.
A very important thing that should be noted is that the clan wars are fought in an entirely different area and no harm can come to your village. Instead of regular villages, you prepare and attack ‘war bases’ and this has no relation to your village or its resources.
The matchmaking is always done between clans with same number of war bases and of similar sizes. Consequently, some members of a clan can be put in spectator mode to even out the teams for fairness. The member with the least trophies will be out in spectator mode.
You can only see the War Map, i.e., the area of the war zone only after a war begins.
Clash of Clans: Clan Wars release date rumored to be in 22 April this year.