07/30/2026
30 JULY 1864 – BATTLE OF THE CRATER
“It was the saddest affair I have witnessed in this war.”
– Lieutenant General Ulysses S. Grant
In an attempt to break the stalemated Siege of Petersburg, U.S. Army troops detonated powerful explosives under an enemy strongpoint, blowing a massive hole in Confederate defenses. The subsequent assault was poorly executed and ultimately repulsed, earning infamy as one of the most tragic tactical failures in U.S. Army history.
On 25 June, two weeks after the Siege of Petersburg began, the 48th Pennsylvania Infantry (a regiment led by a mining engineer and largely composed of coal miners) began tunneling towards Confederate lines with the objective of detonating a massive quantity of gunpowder under an enemy bastion called Elliott’s Salient, creating a rupture in the Confederate line which Union troops could theoretically exploit.
The 511-foot-long tunnel was excavated over the course of a month, and four tons of black powder were placed below Elliott’s Salient. The explosive charge was detonated at approximately 0445 on 30 July and obliterated the fort, killing over 350 Confederate soldiers and creating a massive crater 25 to 30 feet deep, 150 feet wide, and 200 feet long.
Although the detonation was a resounding success, Union efforts to capitalize on their tactical coup rapidly deteriorated. Troops from IX Corps assaulted into and around the crater, but the attack was poorly coordinated, and units piled up in and around the crater instead of moving forward.
The Confederates recovered from the shock and responded with artillery fire into the closely packed U.S. soldiers as the rebels counterattacked and retook the position, slaughtering many of the trapped Black U.S. soldiers indiscriminately even after they surrendered.
At 0945 the attack was called off and all U.S. units withdrew to their own lines by 1400, having sustained about 3,800 casualties compared with roughly 1,500 Confederate losses. The Petersburg Campaign ground on for another eight months.