The Reinforcements Button is a relatively new feature in League of War, which enables the player to deploy a wave of units to assist in battle. Each deployment of reinforcements will cost the player 10 Energy or 10 Gold. If a player has at least one Energy Boost in their inventory, this will be offered as an alternative when the player doesn't have sufficient energy. While the strength of the deployed units varies depending on alliance ranking, non-alliance players also have access to reinforcements. In this case however, they are relatively weak.
Currently, the following units are known to be provided as reinforcements:
- Harpy (×2).
- Nemea (×2).
- Hydra (×2).
- Gladius (×2).
The rank, level and composition of these units will depend upon the player's alliance ranking.