Colonel Kanehiko Atsuchi commanded the 2,000 soldiers and sailors of the Suribachi garrison. The Japanese had honeycombed the mountain with gun positions, machine-gun nests, observation sites, and tunnels, but Atsuchi had lost many of his large-caliber guns in the direct naval bombardment of the preceding three days. General Kuribayashi considered Atsuchi’s command to be semiautonomous, realizing the invaders would soon cut communications across the island’s narrow southern tip. Kuribayashi nevertheless hoped Suribachi could hold out for 10 days, maybe two weeks. Some of Suribachi’s stoutest defenses existed down low, around the rubble-strewn base. Here nearly 70 camouflaged concrete blockhouses protected the approaches to the mountain; another 50 bulged from the slopes within the first hundred feet of elevation. Then came the caves, the first of hundreds the Marines would face on Iwo Jima. The 28th Marines had suffered nearly 400 casualties in cutting across the neck of the island on D-day. On D+1, in a cold rain, they prepared to assault the mountain. Lieutenant Colonel Chandler Johnson, commanding the 2d Battalion, 28th Marines, set the tone for the morning as he deployed his tired troops forward: “It’s going to be a hell of a day in a hell of a place to fight the damned war!” Some of the 105mm batteries of the 13th Marines opened up in support, firing directly overhead. Gun crews fired from positions hastily dug in the black sand directly next to the 28th Marines command post. Regimental Executive Officer Lieutenant Colonel Robert H. Williams watched the cannoneers fire at Suribachi “eight hundred yards away over open sights.” [Illustration: _A dug-in Marine 81mm mortar crew places continuous fire on Japanese positions around the slopes of Mount Suribachi preparatory to the attack of the 28th Marines._ Department of Defense Photo (USMC) 109861 ] As the Marines would learn during their drive north, even 105mm howitzers would hardly shiver the concrete pillboxes of the enemy. As the prep fire lifted, the infantry leapt forward, only to run immediately into very heavy machine-gun and mortar fire. Colonel Harry B. “Harry the Horse” Liversedge bellowed for his tanks. But the 5th Tank Battalion was already having a frustrating morning. The tankers sought a defilade spot in which to rearm and refuel for the day’s assault. Such a location did not exist on Iwo Jima those first days. Every time the tanks congregated to service their vehicles they were hit hard by Japanese mortar and artillery fire from virtually the entire island. Getting sufficient vehicles serviced to join the assault took most of the morning. Hereafter the tankers would maintain and re-equip their vehicles at night. [Illustration: Colonel William P. McCahill Collection