The 4th Psychological Operations Group was activated in December 1967; it was created as a substantial expansion of capability, equipment, and staffing to address increased demands for PSYOP support by Allied units fighting the war throughout the Republic of Viet-Nam.  The 6th PSYOP Battalion, deployed to Viet-Nam in 1965, became the new 4th PSYOP Group.  The existing companies of the 6th Battalion were redesignated as Battalions under the 4th PSYOP Group as follows:
 

19th PSYOP Company:      10th PSYOP Battalion

244th PSYOP Company:      7th PSYOP Battalion

245th PSYOP Company:      8th PSYOP Battalion

246th PSYOP Company:      6th PSYOP Battalion


This is the roster of the Commanding Officers of the 4th PSYOP Group, dating back to the date the Group was activated in Viet-Nam:

 Command Dates                            Commanding Officer

1966 - 1967 COL David W. Affleck

1967 - 1968                         COL William Beck

1968 - 1969                         COL Taro Katagiri           

1969 - 1971                          COL Russell Jones

1971                               COL Frank Westling

1971 - 1972  Group Inactivated             

1972-1973                         COL William Hudson

1973-1975                         COL Frank T. Hodes

1975-1977                         COL Billy Stanberry

1977-1978                         COL Henry Ellison

1978-1979                         COL Charles McLain

1979-1982                         COL Alfred Paddock

1982-1984                         COL Harold Fraley

1984-1986                         COL Melvin Kreisel

1986-1988                         COL William DiPalo

1988-1990                         COL Anthony Normand

1990-1993                         COL Layton G. Dunbar

1993-1995                         COL Jeffrey B. Jones

1995-1997                         COL William C. Hunter

1997-1999                         COL Charles Borchini

1999-2001                          COL Christopher E. St. John

2001-2003                         COL James Treadwell

2003-2005                         COL Jack N. Summe

2005-2007                         COL Kenneth Turner

2007-2009                         COL Curtis Boyd

2009-2011                          COL Carl Phillips

2011-2013                          COL Reginald Bostick

2013-2015                          COL Bruce Leahy

2015-2017                          COL Robert A. B. Curris

2017-2019                          COL Bethany C. Aragon

2019 - 2021 COL Jason Smith

2021 - 2023 COL Christopher D. Stangle

2023 - Present COL Rustie W. Kim