Scope and Contents Diary kept by Lieutenant Colonel Clifford C. Neilson, Commander of the 4th Battalion, 23rd Infantry, 25th Infantry Division in Vietnam from May to November 1968.  It was written in the evening and recounts actions of the unit but much of the diary is written in shorthand and acronyms as it was created while engaged in heavy combat by the author in the vicinity of Ton Sonh Nhant Airbase near Saigon and Tay Ninh Province.  Neilson records that they suffered 38 men killed in action, 218 wounded...