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I found this awesome article[answers.yahoo.com] online which I think some people could learn some things from. To quote the top rated answer directly:

引用自 ogloriad：

Usually in Military they are procedure.
Following order is important because, it can save your life or others it can keep you away of making disastrous mistakes.
That is why they are rank in military, people with more experience and studies, than you can help you and teach you what they know, through your way.
They are like teacher, they should know think we don't!
But always remember, that nobody is perfect, and all of us can make mistake include the better general!