One of the classic books about the Vietnam War, is of course, We Were Soldiers Once ...and Young by marine Lt. Gen. Harold G. Moore and journalist Joseph Galloway.  It is the account of the Battle of the Ia Drang Valley in November of 1965. According to Google Books "Each year, the Commandant of the U.S. Marine Corps selects one book that he believes is both relevant and timeless for reading by all Marines. The Commandant's choice for 1993 was We Were Soldiers Once . . . and Young." It was also a N.Y. Times bestseller, who knew there were so many military history fans.