Meanwhile, back on the beach, the U.S. Navy had been busy pouring in supplies and men. By D plus 12 it had landed more than 23,000 cargo tons and nearly 34,000 men. Marine fighters overhead provided continuous cover from Japanese air attacks. The Marine 3d Defense Battalion was set up with long-range radar and its antiaircraft guns to give further protection. (This battalion also had long-range 155mm guns that pounded Japanese attacks against the perimeter.)
By now, the 37th Infantry Division on the left was on firm ground, facing scattered opposition, and able to make substantial advances. It was very different for the 3d Marine Division on the right. Lagoons and swamps were everywhere. The riflemen were in isolated, individual positions, little islands of men perched in what they sarcastically called “dry swamps,” This meant the water and/or slimy mud was only shoe-top deep, rather than up to their knees or waists, as it was all around them. This nightmare kind of terrain, combined with heavy, daily, drenching rains, precluded digging foxholes. So their machine guns had to be lashed to tree trunks, while the men huddled miserably in the water and mud. They carried little in their packs, except that a variety of pills was essential to stay in fighting shape in their oppressive, bug-infested environment: salt tablets, sulfa powder, aspirin, iodine, vitamins, atabrine tablets (for supressing malaria), and insect repellent.
Colonel Frazer West, who at Bougainville commanded a company in the 9th Marines, was interviewed by Monks 45 years later. He still remembered painfully what constantly living in the slimy, swamp water did to the Marines: “With almost no change of clothing, sand rubbing against the skin, stifling heat, and constant immersion in water, jungle rot was a pervasive problem. Men got it on their scalps, under their arms, in their genital areas, just all over. It was a miserable, affliction, and in combat there was very little that could be done to alleviate it. The only thing you could do was with the jungle ulcers. I’d get the corpsman to light a match on a razor blade, split the ulcer open, and squeeze sulfanilamide powder in it. I must have had at one time 30 jungle ulcers on me. This was fairly typical.” Corpsmen painted many Marines with skin infections with tincture of merthiolate or a potassium permanganate solution so that they looked like the Picts of long ago who went into battle with their bodies daubed with blue woad.
The Marines who had survived the first two weeks of the campaign were by now battlewise. They intuitively carried out their platoon tactics in jungle fighting whether in offense or defense. They understood their enemy’s tactics. And all signs indicated that they were winning.
[Sidebar ([page 18]):]
Navajo Code Talkers
Marines who heard the urgent combat messages said Navajo sounded sometimes like gurgling water. Whatever the sound, the ancient tongue of an ancient warrior clan confused the Japanese. The Navajo codetalkers were busily engaged on Bougainville, and had already proved their worth on Guadalcanal. The Japanese could never fathom a language committed to sounds.
Originally there were many skeptics who disdained the use of the Navajo language as infeasible. Technical Sergeant Philip Johnston, who originally recommended the use of Navajo talkers as a means of safe voice transmissions in combat, convinced a hardheaded colonel by a two-minute Navajo dispatch. Encoding and decoding, the colonel then admitted, would have engaged his team well over an hour.