An option for playerAttachment
giveUnitControl
values: allow multiple players to give units to multiple other players, if those units are in a designated territory
must be a list of the player's names, in a ":" delimited list. Example: value="Russians:Chinese"
<attatchment name="playerAttatchment" attatchTo="Americans" javaClass="games.strategy.triplea.attatchments.PlayerAttachment" type="player">
<option name="giveUnitControl" value="Russians"/>
</attatchment>