I cheated 10 years ago and my spouse doesn't know. Do I have to tell him?

I cheated 10 years ago and my spouse doesn't know. Do I have to tell him? I once watched a video tape of a US Navy Psychiatrist who had done marriage counseling to Navy Couples for 30 years. He said a Navy marriage could survive the spouse cheating……..as long as the other spouse didn’t find out about it.