Tanks, provided by the Company A direct support tank company, were used day and night, firing from nine positions along the MLR. Their effective use to mark air targets was of particular importance in connection with their support role, while the tank light also helped to provide illumination of the objective area in hours of darkness. Approximately 7,000 rounds of 90mm tank ammunition were fired. During these five tense days the enemy deluged Marine positions with 45,000 rounds of artillery, mortar, and mixed fire. Indicative of the savage pounding the Vegas area took is the fact that incoming Chinese artillery for the full two-week period from 1–15 March totaled only 3,289 rounds. Marine efforts to defend, counterattack, secure, and hold the Vegas outpost against repeated Chinese assaults were “marked by maximum use of and coordination with various supporting arms and organic weapons.”[386] Three light artillery battalions, two medium battalions, two 8-inch batteries, one 4.5-inch rocket battery, and two companies of 4.2-inch mortars fired a combined total of 104,864 rounds between 27–31 March; the 11th Marines and its heavy Army reinforcing elements, in support of 5th and 7th Marines units, executed 332 counterbattery and 666 countermortar missions. Of the total number fired, 132 were air observed. [386] 5thMar SAR “Cities,” p. 8. The artillery shelling was the hottest during a 24-hour period ending at 1600 on 28–29 March. During this time 35,809 rounds were fired (33,041 from the four Marine battalions). This even surpassed the previous record of 34,881 rounds fired during a one-day period in the Bunker Hill defense of August 1952. A new one-day battalion total for West Korean fighting was also set on the 28th; 1/11 fired 11,079 rounds, exceeding the record of 10,652 set by 3/11 during the Bunker Hill fighting. Marines at a rear area supply point achieved another record. In a 24-hour period, during the heavy fighting on 28–29 March, 130 men handled 2,841 tons of ammunition. Second Lieutenant Donald E. Spangler, an ammunition platoon commander with the 1st Ordnance Battalion, who had but 13 hours’ sleep in the entire five days of fighting, proudly noted that his unit had “more than doubled the tonnage that the U.S. Army says a man can handle in 14 hours.”[387] [387] Heinecke, _op. cit._, p. 50. As for the men on the front line, besides the Medal of Honor winners, 10 Marines were awarded the Navy Cross, the nation’s second highest combat award. Nine citations were for the Vegas action and one for the 1st Marines defense of Dagmar, in staving off an enemy penetration on the night of the 26th.