Elements of 2d Bde, 1st ACD relieve 1st Battalion, 9th Marines on Hill 471; 1/9 commences sweep to northwest toward Hill 689. 6 Apr 1st Bde, 1st ACD helilifted north of KSCB. 2/26 and 3/26 push north of combat base; Company G, 2/26 engages enemy force and kills 48 NVA. 8 Apr 2/7 CavSqd links up with 26th Marines and conducts official relief of combat base. 1/26 attacks to the west. 3d ARVN Airborne Task Force air assaults into LZ Snake west of Khe Sanh and kills 78 North Vietnamese. 10 Apr LtGen Rosson arrives Khe Sanh and directs LtGen Tolson to disengage and prepare for Operation DELAWARE in A Shau Valley. 11 Apr Engineers complete renovation of Route 9 and road is officially opened. Elements of 1st ACD begin withdrawal to Quang Tri City in preparation for Operation DELAWARE; 37th ARVN Ranger Battalion airlifted to Da Nang. 12 Apr Col Meyers relieves Col Lownds as CO, 26th Marines. 14 Apr 3/26 attacks Hill 881N and kills 106 NVA; 6 Marines are KIA. 15 Apr Operation PEGASUS terminated; Operation SCOTLAND II begins. 18 Apr 26th Marines withdrawn to Dong Ha and Camp Carroll. 23 May President Johnson presents the Presidential Unit Citation to 26th Marines and supporting units during White House ceremony. 23 Jun Although forward fire support bases are maintained in Khe Sanh area, the KSCB is dismantled and abandoned. LZ Stud at Ca Lu is selected as base for air mobile operations in western DMZ area. APPENDIX D =TASK ORGANIZATION AT KHE SANH, 24 APRIL-13 MAY 1967= =A. 3D MARINES (-) (REIN)= 24APR-13MAY67 HEADQUARTERS COMPANY 24APR-13MAY67 2D BATTALION (REIN) 26APR-13MAY67 HEADQUARTERS AND SERVICE COMPANY(-)(REIN) DET, HQBN, 3D MARDIV DET, HQCO, 3D MAR DET, B BTRY (REIN), 1ST BN, 12TH MAR DET, 15TH DENTAL CO 2D CLEARING PLT (REIN), CO B, 3D MED BN 1ST PLT (-) (REIN), CO A, 3D ENGR BN 1ST PLT (REIN), CO C, 3D MT BN 1ST PLT (-) (REIN), CO C, 3D SP BN DET, LSU, FLC COMPANY E (REIN) 1ST SEC, 81MM MORTAR PLT FAC TEAM DET, MED PLT DET, INTELLIGENCE SEC DET, B BTRY (REIN), 1/12 1ST SQD, 1ST PLT (REIN), CO A, 3D ENGR BN DET, 1ST PLT (REIN), CO C, 3D SP BN