Book excerpt: This thoroughly documented chronology of the April 1972 invasion of South Vietnam by the North Vietnamese Army, called the Easter Offensive, serves both as a historical lesson and a remarkable war memoir. On the Marine Corps Commandant's professional list for years, it is told with authority and compassion by a crucial player, an American Marine who was a senior advisor to the Vietnamese Marines. When first published in hardcover in 1984, it was a selection of the Military Book Club.