The "command channel" in fso is what the axis or allied commander ie "CiC" uses to direct the battle. The CiC does not use country channel. This channel is always indicated in the orders.
Anyone who fly's FSO needs to tune this channel. Not just the squad commanders but everyone. This way you will know what is going on in the battle.
Tonight I had several squads who were not aware of this channel and ended up flying around the whole time with no enemy contact. This caused some frustration among some squads.
The command channel is typically ch 150 for both sides. However the CiC can change this to whatever channel he wants. So be sure to check the orders.