You Will Not Forget Donn Sweet Friends from high school still talk about the zany antics of Donn Sweet, a bright guy with a wild sense of humor. After college, he was drafted and sent to Vietnam. Lt. Sweet had a sign over his tent that said, Smile! That's an order! br>The letters he wrote home brim with his humor, but they also contain brutal details and an unswerving look at war. This is a book about life and death in Vietnam, but it is also a book about all wars and the families they affect forever.