Battery C, 1st 4.5-inch Rocket Battalion, FMF, moved to advance positions in the morning to increase the pressure on the Yongdungpo garrison. Land counterpart of the LSMRs which rocked the Inchon waterfront on D-day, this unit had seen little action to date, owing to the lack of M48 fuses for its missiles. Banking on substitute detonating devices (M51 for 105mm and 155mm Howitzer shells), First Lieutenant Eugene A. Bushe ordered his gunners to fire a test salvo of 24 rockets. No visible effect being noticeable from his OP, the battery commander then called for a full ripple of 144--enough high explosive to flatten a good portion of the town. Again the big missiles plowed into the target area with a dull thud, and Bushe withdrew his battery to the rear. The M48 fuses did not arrive until 28 September, with the result that the potent Marine rocket artillery was sidelined until the closing days of the operation.[343] [343] _Ibid._; and Capt D. A. Rapp interv, 18 Nov 54, with comments by Capt E. A. Bushe. Colonel Puller’s tactics during the bombardment on 20 September were designed to align the 1st Marines for the actual assault of Yongdungpo, planned for the next day. It was necessary to occupy in strength all the final approaches to the town, so that the full weight of the regiment could be brought to bear against the defending garrison. From left to right, therefore, the schedule of operations on the 20th was as follows: (1) 1st Battalion to seize Hills 80 and 85; (2) 3d Battalion to remain in position on Lookout Hill; and (3) 2d Battalion to advance to the first of two highway bridges which spanned branches of the Kalchon just outside of Yongdungpo. These limited attacks would also provide time for the 32d Infantry to catch up on the right. The day’s mission for the Army unit was to attack over a six-mile front and secure, among other objectives, towering Tongdok Mountain south of the MSR and two miles from Yongdungpo.[344] [344] 1st MarDiv _SAR_, Annex Peter Peter; and 7th InfDiv _OpnO 2_. Shortly after first light, Lieutenant Colonel Hawkins reached the crest of Hill 118 and established his OP. He was in time to see Able and Charlie Companies repulse disconnected Red elements moving on the Marine lines from Hills 80 and 85. While the battalion commander issued his order for the attack, Major William L. Bates, Jr., commander of 1/1’s Weapons Company, set up his “supporting arms center” to cover the impending assault.[345] [345] Though not provided for in Fleet Marine Force T/O, the “supporting arms center,” a provisional facility for coordination modeled after the regimental SAC, was a favorite with many battalion commanders in the field.