Other editions listed on GR are incorrect. This was first published in 1988 by the History and Museums Division, Headquarters Marine Corps, NOT Createspace, etc. LCN 77-604776 This is the sixth volume in a planned nine-volume operational and chronological series covering the Marine Corps' participation in the Vietnam War. A separate functional series will complement the operational histories. This volume details the change in U.S. policy for the Vietnam War.