Iterating combat rounds

I am having trouble figuring out how to step through combat rounds in a turn based combat system.
My intention is to take input from each combatant during each combat round before the next round
is allowed to begin. I have it waiting for input and everything runs successfully in that regard, but I
do not know how to make it wait to advance combat rounds until everyone has taken their turn.

The methods I implement are as follows:

Code (CSharp):

1.  
2. void ExecuteCombatRounds() {
3.            
4.     if(aiCount > 0) {
5.            
6.         CombatRound();
7.     }
8. }

Of course all that method does is advance through each combat round while there are AI still alive, but
that is not exactly what needs to happen. I also need it to wait for all combatants involved to have taken
their turn if there are AI still alive.

Here is the CombatRound():

Code (CSharp):

1.  
2. void CombatRound() {
3.  
4.     i_combatRound++;
5.  
6.     Debug.Log("** COMBAT ROUND: " + i_combatRound + " **");
7.  
8.     SetActiveCombatant();
9.  
10.     SelectTargets();
11.  
12.     SortTargetsByDistance();
13.  
14.     SetActiveTarget();
15.  
16.     ExecuteCombatantTurns();
17. }

And here is the ExecuteCombatTurns():

Code (CSharp):

1.  
2. void ExecuteCombatantTurns() {
3.        
4.     if(_activeCombatant.GetComponent<AI>() != null) {
5.  
6.         StartCoroutine(EnemyActionSelection());
7.     }
8.        
9.     if(_activeCombatant.GetComponent<Player>() != null) {
10.            
11.         StartCoroutine(PlayerActionSelection());
12.     }
13. }

As I mentioned, those coroutines execute fine and take either AI or Player input. The problem
is that I don't know how to hold the advance of each combat round until after they have all
taken their turn. Thanks in advance for the help and advice.