[325] The initials TOT stand for Time on Target--an artillery order calling for all guns to time their firing so that projectiles will hit the target simultaneously. The performance was embellished on the 10th when Marine tanks, mortars, and machine guns added their fire to the grand crescendo of exploding shells and bombs. The Communists were also bombarded with 50,000 leaflets inviting them to the Marine birthday dinner that evening. Twenty Korean Reds actually did surrender, though some doubt remained whether they had responded to the invitation or the TOT. General Van Fleet sent a message to all Marines in his command, congratulating them on “a job well done” in Korea.[326] [326] EUSAK _Cmd Rpt_, Nov 51, 42. On 11 November the 5th Marines carried out its relief of the 1st Marines on Line MINNESOTA. This was the occasion for the largest helicopter troop lift so far, involving the transportation of nearly 2,000 combat-equipped men. Operation SWITCH began at 0635 on D-Day when three helicopters took off from Field X-83 with Shore Party specialists to signal aircraft into landing sites and supervise the unloading and reloading of troops. Twelve helicopters were employed, each carrying five men and supplies from the 1st Battalion, 5th Marines (Lieutenant Colonel Kirt W. Norton), and returning to Field X-83 with a like load from Lieutenant Colonel Clifford E. Quilici’s 2d Battalion, 1st Marines.[327] [327] HMR-161 _HD_, Nov 51; _Cavalry of the Sky_, 174. Naval gunfire from the USS _New Jersey_ helped to keep the enemy quiet during the relief. All told, 950 men were flown to Hill 884--soon to be known unofficially as “Mount Helicopter”--and 952 lifted to Field X-83 in return flights. Total flight time was 95.6 hours and over-all time 10 hours. Once again the Marine Corps had made tactical history. Ground forces operations throughout November seldom varied from the familiar pattern of squad-size patrols nightly and an occasional daytime raid by a company-size task force with the support of artillery and air. Supporting arms kept enemy strongholds under almost constant fire, and North Korean activity in the construction or improvement of bunkers provided frequent targets of opportunity. Contacts seemed to be avoided by enemy troops. On the night of 29 November, for instance, 11 Marine ambush patrols ranged from 1,500 to 2,500 yards ahead of the MLR with only a single contact before returning at daybreak. One enemy KIA was inflicted and one prisoner taken at a cost of four Marine WIA casualties. Total Marine casualties (including the KMCs) during November were 34 KIA and 250 WIA. Enemy losses amounted to 408 counted and 1,728 estimated KIA, 2,235 estimated WIA, and 104 prisoners. _The Second Marine Christmas in Korea_