Four months ago I fled like a thief from my native village; oh, fatal mistake, fatal mistake!
He made a fatal mistake in not informing me of this marriage; but I promise to recall him.
In my opinion it is a fatal mistake to teach the young black man and the young white man that the dominance of the white race in the South rests upon any other basis than absolute justice to the weaker man.
This move turned out to be a fatal mistake in the political career of the colonel.
Johnston made a fatal mistake in intrusting so important a command to Floyd, who he must have known was no soldier even if he possessed the elements of one.
I then thought, and still think, that was a fatal mistake.
It was a fatal mistake, however, that halted General Halleck at Corinth, and led him to disperse and scatter the best materials for a fighting army that, up to that date, had been assembled in the West.
It is a fatal mistake to suppose that the Lord Jesus did not feel in every respect, as man should feel, the varied exercises through which He passed.
No, no, reader; it is a fatal mistake to imagine that the world is improving.
Yes, it is a fatal mistake to begin to run when you discover you are lost, for I can assure you that it is not a difficult matter for even an old and experienced scout to lose himself, if he lets his mind and attention wander.
All at once it dawned on him he was lost, so he started running (a fatal mistake), and remembers no more.
In the above yarn I have told you that the lost man began to run, and have noted it was a fatal mistake.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "fatal mistake" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.