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The Ontos supported the infantry on patrols, reconnaissance missions, search and clear operations, as night time perimeter security/ re- action forces. Because of the particular characteristics of the Ontos (narrow, light weight, low silhouette, speed and rapid engage- ment or targets) it proved to be an extremely effective direct fire support weapon for the front line infantry man. On 14 Sep65 an Ontos hit a mine and overturned while in support of the 2nd Battalion, 9th Marines. The type of mine was never de- termined. The vehicle was subsequently destroyed on the battle field by EOD personnel. On 15 Sep65 a second Ontos was hit by a mine in the same general area as the above, again type undetermined. The vehicle was evacuated to FSLG, damage was extensive.
(3) DaNang Enclave. H&S Company (-) AST987711 improved defensive po- sitions and started construction of camp contonment. The company conducted a search and clear operation in the village of Yen Bac AT989701 on 9 September and again on 21 September. On 25 September H&S Company in conjunction with H&S Company 1st Am Trac Battalion conducted an amphibious river reconnaissance of the Song Cau Do river. On 28 September members of H&S Company supported by a blocking force from 3d Tank Battalion, two LVTP-5's from 1st Am Trac Battalion and 13 RF/PF Vietnamese from Hoa Cam Training Center conducted a search and clear operation through the villages of Cam Hoa and Yen Bac. Eight VCS were turned over to the Security Officer at Hoa Cam Training Center, 7 were released, one VCS was detained for further questioning. It is significant to note that cooperation between US Marines, US Army Advisors and Vietnamese were excellent, each agreeing that continued work along these lines was necessary.
Company "A" (-) (Rein). 1st platoon conducted road reconnaissance South of 1st Battalion, 1st Marines C.P. and supported the 1st Marines move South to hill 41 AT934663 and hill 22 at AT953667. The 1st platoon also provided Battalion C.P. and perimeter security during the reporting period. The second platoon remained in a static position with one light section supporting Company "E" 2nd Batttalion, 3d Marines at Le My and a heavy section at the Battalion C.P. as night perimeter security/reaction force. The light section at Le My supported operation Harvest Moon (rice harvest protection at Le My). The 3d platoon remained attached to the 3d Battalion, 4th Marines at Hue Phu Bai they were assigned night perimeter security, and expended 89 major rounds H&I fire on 12 September in GS8708.
Company "C" (Rein). 1st platoon in direct support of the 1st Battalion, 9th Marines operated in the Tra Khe complex (2000 meters South West of Marble Mountain) while in support of the 1st Battalion, 9th Marines operation. They expended 1400 rounds of 30 caliber machinegun ammunition and 225 rounds of sub machinegun ammunition. On 9 September the 1st platoon supported the 1st Battalion, 9th Marines in a search and clear operation South of Marble Mountain with negative results. The platoon was assigned an additional mission of night perimeter security. On 23 September they supported a sweep and clear operation in the vicinity of Man Quan BT045685 with negative results. The 2nd platoon supported the 2nd Battalion, 9th Marines. They acted as a covering force for resupply columns and participated in Ontos/infantry patrols. They provided night time perimeter security/reaction force.
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