PFC James W. Brock III
Here's the information I've been able to compile thus far. Note that anything that is either speculative or not properly sourced will be in italics.
PFC James Walter Brock was a Rifleman attached to Echo Co. 2nd Battalion, 4th Marine Regiment, 3rd Marine Division, III Marine Amphibious Forces.
James attended Miami Springs Junior High School. His wife, Mrs. Barrie Brock of 220 Lawn Way was expecting their first child at the time of his death. He was also survived by his mother, Mrs. Barbara Moran of Hialeah, father James W. Brock Jr. of Cullman, Alabama, and two brothers, Richard C. Brock and Steven Brock.
James arrived in Southeast Asia on September 26, 1967 to begin his tour of duty.
Fighting in Quang Tri Province, North of the city of Hue, his rifle platoon was ambushed by Viet Cong, and he was killed November 4, 1967.
From Wikipedia's entry on Brock's unit, 2nd Bn, 4th Marines -- the battalion was engaged in fighting in an area known as "Leatherneck Square" - a 54 sq. mile area just south of the Vietnamese DeMilitarized Zone (DMZ) - located less than 2 miles from North Vietnam - which saw some of the heaviest fighting of the Vietnam War. It is likely that James fought in Operation Kingfisher during the siege of Con Thien (meaning "Hill of Angels")
According to an online source, www.virtualwall.org, James is interred at Vista Memorial Gardens in Miami Lakes, but I have not yet verified that. - and he is honored on the National Vietnam Memorial, at Panel 29E, Line 018.
If you have photos, memorabilia, or further information regarding James's life and his service, please let me know, you can email to firstname.lastname@example.org.