Dulacki was ordered to
South Vietnam in July 1965 and joined the headquarters of
III Marine Amphibious Force (III MAF) under Lieutenant General
Lewis W. Walt in
Da Nang. He served as assistant chief of staff for intelligence under Walt and coordinated collecting, compilation, and analysis of
intelligence which was crucial for Operations
Starlite,
Piranha, and
Harvest Moon. Dulacki returned to the United States in May of that year and received a third Legion of Merit for his service with the 3rd Marine Division. Following his return stateside, he assumed duty at
Headquarters Marine Corps as the director of the Marine Corps Command Center. He served in this capacity until August 1967, when he was promoted to the rank of brigadier general and appointed assistant director of personnel. The next year, in June 1968, Dulacki transferred to Camp Pendleton, California and was appointed assistant division commander,
5th Marine Division under his former superior, Major General Wood B. Kyle. The division served as a component of the
Marine Corps Reserve and trained reservists and replacements during
Vietnam War. Following the retirement of General Kyle one month later, Dulacki assumed command of the division and served in this capacity until the end of May 1969. He was decorated with a fourth Legion of Merit for his service with that command. during his retirement ceremony on December 28, 1973. Dulacki returned to South Vietnam in June 1969 and assumed duty as operations officer of the III MAF under Lieutenant General
Herman Nickerson Jr. He participated in the planning of the redeployment of the
3rd Marine Division, which was detached from III MAF and transferred to
Okinawa within Operations
Keystone Eagle and
Keystone Cardinal. Throughout the rest of 1969, he participated in the planning and execution of several search and destroy operations including
Oklahoma Hills,
Pipestone Canyon. The units of III MAF inflicted severe losses on the enemy and captured over 17,000 weapons and tons of enemy munitions, supplies, and foodstuffs. Dulacki served in that capacity until December 22, when he succeeded Brigadier General
George E. Dooley as chief of staff of III MAF. Dulacki continued in that capacity until mid-June 1970, when he was relieved by Brigadier General
Thomas H. Miller and ordered back to the United States. For his service with III MAF during his second tour in Vietnam, Dulacki was decorated with the
Navy Distinguished Service Medal and also received the
National Order of Vietnam, Rank Knight,
Vietnam Gallantry Cross with Palm and
Korean Order of Military Merit, 5th Class. Following his return, Dulacki assumed command of the
4th Marine Division at Camp Pendleton, California and was again responsible for the training of Marine reservists. He was promoted to the rank of major general on August 17, 1970, and held command of the division until March 1973. Dulacki then briefly served at Headquarters Marine Corps as Inspector General of the Marine Corps, before he was promoted to the rank of lieutenant general on May 14, 1973, and appointed director of personnel/deputy chief of staff for manpower. He retired from the Marine Corps after almost 32 years of active service on January 1, 1974, and received his second Navy Distinguished Service Medal at his retirement ceremony. ==Retirement==