On 5 November General Vandegrift sent a message to Major Carlson by airdrop. Army and Marine elements were moving east from the perimeter to mop up a large force of Japanese located near the Metapona River. This enemy unit, the 230th Infantry Regiment, had cut its way through the jungle from the west as part of a late-October attack on Edson's Ridge by the Sendai Division. For various reasons, the 230th had failed to participate in the attack, and then had completed a circumnavigation of the Marine perimeter to reach its current location in the east. The Tokyo Express had recently reinforced it with a battalion of the 228th Infantry. Vandegrift wanted the raiders to march from Aola and harass the Japanese from the rear. Carlson set out with his force on 6 November, with a coastwatcher and several native scouts as guides. Among the islanders was Sergeant Major Jacob Vouza, already a hero in the campaign. The men initially carried four days of canned rations. The raiders moved inland before heading west. The trails were narrow and overgrown, but the native scouts proved invaluable in leading the way. On 8 November the point ran into a small Japanese ambush near Reko. The next day the column reached Binu, a village on the Balesuna River eight miles from the coast. There Carlson halted while his patrols made contact with Marine and Army units closing in on the main Japanese force. On 10 November Companies B, D, and F of the 2d Raiders landed at Tasimboko and moved overland to join up with heir commander. (Company D was only a platoon at this point, since Carlson had used most of its manpower to fill out the remaining companies prior to departing Espiritu Santo.) From that point on the raiders also received periodic resupplies, usually via native porters dropped on the coast by Higgins boats. Rations were generally tea, rice, raisins, and bacon--the type of portable guerrilla food Carlson thrived on--reinforced by an occasional D-ration chocolate bar. On the nights of 9 and 10 November about 3,000 Japanese escaped from the American ring encircling them on the Metapona. They were hungry and tired, and probably dispirited now that they had orders to retrace their steps back to the western side of the perimeter. But they were still a formidable force. On the 11th the 2d Raiders had four companies out on independent patrols while the fifth guarded the base camp at Binu. Each unit had a TBX radio. At mid-morning one outfit made contact with a patrol from 1st Battalion, 7th Marines, and learned of the enemy breakout. A few minutes later Company C ran into a large force of Japanese near Asamama on the Metapona River. The Marines had been crossing a wide grassy area. When the advance guard entered a wooded area on the opposite side it surprised the enemy in their bivouac. In the initial action, the advance guard inflicted significant casualties on the Japanese, but lost five men killed and three wounded. In short order the enemy had the remainder of the company pinned down in the open with rifle, machine gun, and mortar fire.

PFC Frank S Mercado was Declared Missing on 11 Nov 1942.

Mercado's memorial plaque at Cavalry Cemetery in Los Angeles Ca