H-Hour was set for 0300 on 28 May. Attack and diversionary forces on schedule crossed the line of departure, a half-mile north of the MLR. Captain Thompson’s main force advanced nearly to the base of Hill 104 before the Chinese, in estimated reinforced platoon strength, began to counterattack. The fight came to an abrupt end when Second Lieutenant John J. Donahue led his platoon to the top with bayonets fixed.[130] As the Marines dug in they came under heavy mortar and artillery fire from CCF strongholds to the north. On the left, meanwhile, Lieutenant Siers had received orders to seize the closer of his two objectives, former OPLR 5, instead of merely placing suppressive fire on it. [130] Maj Kenneth A. Seal comments on draft MS, dtd Oct 66. At the time of this attack, Lieutenant Seal commanded the 2d Platoon, A/1/7. Moving forward from its base of fire, the platoon soon established contact with the enemy. At 0554 the platoon began its attack on the objective. Despite the close-in, hand-to-hand fighting, when it became apparent the assault could not be stopped the enemy gave way to Marine persistence in seizing the hill. By 0700 the Company C, 7th Marines platoon had secured its objectives and begun preparations for defense of the positions as well as continued support of the main attack force. Heavy casualties, however, forced Lieutenant Colonel Daughtry to recall the platoon and it returned to the lines by 0930. Up on Hill 104, Company A, 1/7 faced practically the same situation. Taking Objective 1 had been costly and the advance through withering enemy fire was adding to the casualties. A reinforcing platoon was sent from the MLR to help the company disengage and return to friendly lines. Contact with the enemy was broken shortly after noon. With the aid of air and artillery, the company was able to make its way to the MLR by 1405. Advancing only as far as it did, the attack, like the one earlier that month, failed to take all the designated objectives. Casualties to the 1/7 Marines were placed at 9 killed[131] and 107 wounded. Most of the latter were evacuated for further treatment. Forty-five of the enemy were counted dead and three wounded. Marines estimated another 40 enemy killed and 40 more wounded.[132] The action resulted in a casualty toll that was the highest to date for any Marine company in western Korea. All three Company A rifle platoon leaders--Second Lieutenants Donahue, Jules E. Gerding, and Kenneth A. Seal--were wounded. This battle also became the occasion for another unwelcomed record--4,053 rounds of enemy incoming, during a 24-hour period.