DECLASSIFIED




HEADQUARTERS
3d Antitank Battalion
3d Marine Division (Rein) FMF
FPO Sn Francisco 96602
                                                                                                                                                      3/ERL/alw
                                                                                                                                                      5750
                                                                                                                                                      Ser:  022-66
CONFIDENTIAL                                                                                                              9 May 1966

From:          Commanding Officer
To:              Commanding General, 3d MarDiv (Rein), FMF

Subj:           Command Chronology, April 1966, submission of

Ref:            (a)  MCO 5750.2
                      (b)  DivO 5750.1

Encl:           (1)  Command Chronology
                      (2)  Staff Journals (S-1 & S-2)
                      (3)  SITREPS #235-241
                      (4)  Company Operational Summaries, Period of 1-30 Apr 1966.
                                H&S, A, B & C

1.  In compliance with reference (a) and  (b) enclosures (1) through
(4) are submitted.


                                                                                                    (Signature)
                                                                                                    BRUCE A. HEFLIN












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PART I

1.          Reporting Unit - 3d Antitank Battalion (Rein)

2.          Period covered - 1-30 April 1966

3.          Date of Submission - 9 May 1966

4.          Commanding Officer - 1-30 Apr 1966
                                                               Lieutenant Colonel BRUCE A. HEFLIN, USMC

5.          Command Post - Republic of South Vietnam (AT987711) Map AMS
                                                    Series L701, Sheet No. 6659  III













                                                                                



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PART II

1.          Operational Data, including attachments:

             a.  Designation/Location

                    (a)  Headquarters and Service Co. (-)                              (DANANG TAOR)
                    (b)  "A" Co. (-)  (Rein)                                                           (DANANG TAOR)
                    (c)  "B" Co. (-)  (Rein)                                                           (HUE-PHU BAI TAOR)
                    (d)  "C" Co. (-)  (Rein)                                                           (DANANG TAOR)

             b.  Period covered by report:  1-30 April 1966

             c.  Name/Rank of Commanding Officer and Staff, and principle sub-
ordinates, including T/O billet assignment.

BATTALION HEADQUARTERS

Commanding Officer................................................................LtCol B. A. HEFLIN
Executive Officer.....................................................................Maj E. H. GRAHAM
S-1/Adj......................................................................................2ndLt G. DOHSE
S-2.............................................................................................Maj E. R. LARSON
S-3.............................................................................................Maj E. R. LARSON
S-3A..........................................................................................Unassigned
Liaison Officer.........................................................................Unassigned
S-4.............................................................................................Capt K. E. SHARFF
Supply Officer..........................................................................2ndLt R. U. BOKELMAN
Motor Transport Officer.........................................................1stLt H. R. MARWICZ
                                                                                                                                   1-12 April
                                                                                                                                   1stLt D. L. TAYLOR
                                                                                                                                   13-30 April
Ordinance/Maintenance Officer.............................................1stLt B. M. MATHEWS
Communication Officer............................................................2ndLt M. C. SCHROEDER
Medical Officer........................................................................HMC G. K. LAW, USN

Headquarters and Service Co. (-)

Commandant............................................................................1stLt J. T. MATHEWS

Company "A" (-)  (Rein)

Commanding Officer................................................................Capt S. R. STEWART
Executive Officer.....................................................................Unassigned
1st Plt Commander...................................................................2ndLt P. F. MC ALEER
                                                                                                                                   1-15 April
                                                                                                                                   SSgt F. G. MISEMER
                                                                                                                                   16-30 April

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2nd Plt Commander.................................................................1stLt M. P. KINGSTON
1st Plt, Co "A", 1st AT Bn Commander................................2ndLt R. W. BERNARD

Company "B" (-)  (Rein)

Commanding Officer................................................................Capt R. F. LANPHIER
Executive Officer.....................................................................Unassigned
                                                                                                                                   1-23 April
                                                                                                                                   Capt D. H. SATCHER
                                                                                                                                   24-30 April
2nd Plt, Co "A", 1st AT Bn Commander...............................1stLt D. J. NOONAN
3d Plt, Co "A", 3d AT Bn Commander..................................SSgt J. A. RODRIGUEZ
                                                                                                                                  1-9 April
                                                                                                                                  2ndLt M. H. PONDER
                                                                                                                                  10-30 April
3rd Plt, Co "B", 3d AT Bn Commander................................2ndLt T. J. MEEHAN
                                                                                                                                  24-30 April
                                                                                                                                  24 April:  Chop from
                                                                                                                                  Company "C", 3d AT Bn

             d.  Average monthly strength during the period:

                                                                                                                                  Officers          Enlisted
                    (1)   3d Antitank Battalion                                                        22                      436
                              (a)  Headquarters and Service Company               10                      165
                              (b)  Company "A"                                                                  3                        90
                              (c)  Company "B"                                                                  5                        96
                              (d)  Company "C"                                                                  4                        85

2.          Sequential listing of significant events.

             a.  Personnel.  During the month there were 15 promotions to
Corporal, 3 to Lance Corporal, and 8 to Private First Class.  The
Battalion sent 49 men on R&R.   One Officer and three enlisted were
medically evacuated for non-battle reasons.   One man was granted emer-

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gency leave to CONUS.  There were two WIA casualties.   One man was
killed and two wounded (non-battle) when they were caught in the back
blast from an accidential firing of an ONTOS.   There were five Article
15 punishments awarded and one summary court-martial.   During the month
two officers, 40 enlisted and one Corpsman were rotated to CONUS.   Three
officer, 64 enlisted, and four Corpsman were joined as replacements.

             b.  Administration.  All companies were on Company Administration
during this period, and employed the Addressograph PAS system.

             c.  Intelligence.  Information concerning the enemy and terrain
was received from III MAF, 3d Marine Division, 9th Marines, and HOA VANG
District Headquarters.   During the reporting period five Viet Cong
Suspects were apprehended in the vicinity of YEN BAC hamlet (AT985701)
and evacuated to higher headquarters for interrogation.  Of this total,
two were subsequently released, and three VCS are still being held for
further interrogation.

             d.  Training.  Training for the month of April was highlighted by
familiarization firing of T/O weapons by all companies.   Utilizing the
contact team method of instruction, the Battalion Ordnance Maintenance
Section sent teams to the gun companies for preventive maintenance and
technical training on the ONTOS.   Plans are being completed for the
Battalion Ordnance Maintenance and Communications Sections to send
contact teams on a regularly scheduled basis to work with the individual
ONTOS platoons on an instructional and application basis, the prime
objective being improved 1st echelon maintenance on the ONTOS and
organic ordnance.   The communications contact team will visit on the
same schedule, with emphasis on 1st echelon maintenance of the communi-
cations equipment of the ONTOS.   It is planned to further expand this
program into the areas of Motor Transport, Maintenance, and Supply.
Antitank company training followed the same pattern as in the past,
with on-the-job training being the primary method of instruction.
Occasional special subjects were covered to meet the ever changing
situation in Vietnam,  such as briefings on intelligence, currrent
policies, prisoner handling, and "Religions of Vietnam".  The Battalion
Motor Transport Section conducted school for all drivers in the DANANG
enclave on preventative maintenance and operation of the wheeled vehicles
organic to the battalion.    Periods of instruction were held on Vietnamese
traffic signs and regulations.   Formal classes on maintenance and func-
tioning of the M-60 machine gun were held for the Battalion security
element.   Two Marines attended a one-week Generator Operator courses
at 3d Engineer Battalion, and received operator's licenses.     Eleven
enlisted men and one officer of the Battalion Reaction Platoon attended
the 3d Engineer Battalion's school on VC mines and booby traps.    A
three day program of accelerated training on riot control forma-

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tions and employment of riot control agents was conducted during the
month.   This training, along with additional Protective Mark drill was
in preparation for possible commitment of one ONTOS platoon and a Pro-
visional Rifle Platoon as part of a Mechanized Task Force for the pro-
tection and evacuation of U. S. nationals from the City of DANANG.

          The Operations Chief attended a Riot Control Agent seminar at Head-
quarters, 3d Marine Division.

                    Operations.    On 1 April 1966 the Battalion was deployed as
follows:
                    (1)   3d Antitank Bn in general support of the 3d Marine Division.
                              
                              (a)  H&S Co (-)  (Bn CP) located DANANG Enclave.

                              (b)  Company "A" (-)  (Rein)  in direct support of the 3d
                                                                                              Marine Regiment. (DANANG)

                                        1st Platoon. Co "A" in direct support of the 3d Marine
                                                                                     Regiment.  (DANANG)

                                        2nd Platoon. Co "A" in direct support of the 2nd Batta-
                                                                                      lion, 3d Marines.  (DANANG)

                                        1st Platoon. Co "A", 2st AT Bn in direct support of the
                                                                                                               1st Battalion, 3d Marines.
                                                                                                               (DANANG)

                              (c)  Company "B" (-)  (Rein) in direct support of the 4th
                                                                                              Marine Regiment.  (HUE-PHU BAI)

                                    2nd Platoon, Co "A", 1st AT Bn in direct support of the
                                                                                                               2nd Battalion, 1st Marines.
                                                                                                               (HUE-PHU BAI)

                                    3d Platoon, Co "A", 3d AT Bn in direct support of the
                                                                                                         4th Marines.  (HUE-PHU BAI)

                              (d)  Company "C"  (Rein) in direct support of the 9th Marine