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Peleliu Part V: Entering Umurbrogol [Mission]

Map: Peleliu 1944 - 9/17/1944
Gamemode: PushTheFrontline (5 phases)
Invaders: United States (allies)
Defenders: Japan (axis)

Last update: 6/3/2025

"Puller's 1st Marines, which had already suffered the most casualties on D-Day, still faced the toughest terrain and positions. It had to attack, relieve Company K, 3/1, on the Point, and assault the ridges of Umurbrogol, south to north.........

During the 1st Marines' action in the first four days of the campaign, all three of its battalions battled alongside, and up onto Umurbrogol's terrible, cave-filled, coral ridges. Berger's 2/7, initially in division reserve, but assigned to the 1st Marines on D plus 1, was immediately thrown into the struggle. Puller fed two separate companies of the battalion into the fight piecemeal. Shortly thereafter, 2/7 was given a central zone of action between Colonel Puller's 1st and 2d Battalions. The 1st Marines continued attacking on a four-battalion front about a 1,000 yards wide, against stubborn and able defenders in underground caves and fortifications within an incredible jumble of ridges and cliffs. Every advance opened the advancing Marines to new fire from heretofore hidden positions on flanks, in rear, in caves above or below newly won ground.

Nothing better illustrated the tactical dilemmas posed by Umurbrogol than did the 19 September seizure of, then withdrawal from, Hill 100, a ridge bordering the so-called Horseshoe Valley at the eastern limit of the Pocket. ........

By D plus 4, the 1st Marines was a regiment in name only, having suffered 1,500 casualties. This fact led to a serious disagreement between General Rupertus, who kept urging Puller onward, and the general's superior, Major General Roy S. Geiger, III Amphibious Corps commander. Based on his own experiences in commanding major ground operations at Bougainville and Guam, Geiger was very aware of the lowered combat efficiency such losses impose upon a committed combat unit.

On 21 September, after visiting Colonel Puller in his forward CP and observing his exhausted condition, and that of his troops, Geiger conferred in the 1st Division CP with Rupertus and some of his staff. Rupertus was still not willing to admit that his division needed reinforcement, but Geiger overruled him. He ordered the newly available 321st Regiment Combat Team (RCT), 81st Infantry Division, then on Angaur, to be attached to the Marine division. Geiger further ordered Rupertus to stand down the 1st Marines, and to send them back to Pavuvu, the division's rear area base in the Russell Islands.........

On 21 September (D plus 5), Rupertus had ordered his 7th Marines to relieve what was left of the 1st and 2d Battalions of the 1st Marines. By then, the 1st Marines was reporting 1,749 casualties. It reported killing an estimated 3,942 Japanese, the capture of 10 defended coral ridges, the destruction of three blockhouses, 22 pillboxes, 13 antitank guns, and 144 defended caves."

https://www.ibiblio.org/hyperwar/USMC/USMC-C-Peleliu/


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