Plural of Commander-in-chief is:
ACommanders-in-chief
BCommander-in-chiefs
CCommander-in-chiefes
DCommander-in-chiefers
ACommanders-in-chief
BCommander-in-chiefs
CCommander-in-chiefes
DCommander-in-chiefers
Related Questions:
Find out which part of the sentence has an error:
He hasn't (A)/done his (B)/homeworks(C)No Error(D).