“War is the father of us all, King of all. Some it makes gods, some it makes men, some it makes slaves, some free.”War stories are not quite as convention-laden as The Western or commedia dell'arte, but it is a near thing. And The Army is frequently featured in such stories for some reason... Here are some things you may rely on. Contrast Peace Tropes. See also the often related Spy Fiction.
See also:Historical Wars
Individual characters (please, do not put entire military units here):
Armies and units: