Friendly fire is not a thing in s1914 , if you have ally you have 'Share maps or RoW', the HC aggressive fire command will fire on neutrals, not on ally's... you are going to do well in this game if you are thinking in terms of friendly fire... something you can consider and which is easy to manipulate is 'Blast Damage, or Splash Damage" from range units... good luck, have fun
Hastings TNT
_S1914 Moderator