Clanmates can send reinforcements to each other's Cities, assuming that both allies have built the Consulate.

Clan marches allow you and your allies to perform joint attacks on a target on the World Map using a single march. This type of attack has increased march time and requires various special Clan march speedups to accelerate it, depending on how many players are taking part in the march. Unlike regular marches, Clan marches can only be sped up four times.

You can only create Clan marches to attack heroic monster squads or other players, including the Forts and/or Capital of an enemy Clan. Special rewards for defeating heroic monsters, such as chests of gifts or Clan resources, will be credited to the Clan on behalf of the player who launched the march.

You can only initiate a Clan march to another Kingdom by opening a portal. If the player initiating the march has the Ayrin avatar, her bonus will not apply to allied reinforcements.

Note that resources looted from other players or monsters will be credited to march participants only after their reinforcements have returned to their respective Cities. This, however, does not affect Experience or Conquest points, which are credited instantly. 
 

Tip.

The amount of rewards each march participant gets depends on their contribution to the fight: the more health+strenght your troops contribute to the raiding party, the more rewards you will get.

 

Raids are a special type of Clan march that have a set deadline for participants to rally their troops, a pre-defined maximum number of participants, and a pre-selected march target. They are common in the preparation stage of the Rise of the Ancients event and the Ragnarök tournament.