Call to Arms effectively doubles the player's early-game forces, allowing them to fend off attackers more easily, raid more effectively, or do both at the same time.
It is recommended to target a larger army, in order to take full advantage of its numbers, and have greater chance of multiplying the player's forces.
Note that Chinese Generals are considered human units and Call to Arms affects them, giving the player chance to have up to 6 Generals instead of the normal limit of 3.
Tale of the Dragon Edit
- Initially, Call to Arms could affect naval units. With patch 2.4, this was changed.