Unit Donation is an integral part of Alliances. Alliances can help bolster up your forces by providing assistance in the form of unit donation. All units can be donated, with the exception of units with special deployment requirements i.e. Drones and Demo Bots.
In order to request units, the request units button must be pressed. This results in a message popping up in the Alliance chat, mentioning that you are requesting units. Each time an Alliance member donates units to you, the request bar updates with the number of units donated.
The Alliance center is necessary in order for troup donation to be performed. The total number of troops that can be donated to you is a number reliant on the level of your Alliance Center.
Each Alliance member can donate a maximum of five units each. These can be any units except for Drones and Demo Bots.