you do it

From my understanding of military time, 0306 would be "zero three zero six hours". If it were just 0300, you would say "zero three hundred hours".

No, there is no such thing as a military alert level known as condition zero. Though, that military alert level does exist in a video game known as counter-strike.

You would say zero for the zeros " so 0001 would be zero zero zero one; or 0015 would be zero zero fifteen and so on. Hope this helped

say zero hundred or twenty four hundred