March 28, 1862

Battle of Glorieta Pass
Union forces stop the Confederate invasion of New Mexico territory when they turn the Rebels back at Glorieta Pass.

This action was part of the broader movement by the Confederates to capture New Mexico and other parts of the West. This would secure territory that the Rebels thought was rightfully theirs but had been denied them by political compromises made before the Civil War. Furthermore, the cash-strapped Confederacy could use western mines to fill their treasury. From San Antonio, the Rebels moved into southern New Mexico (which included Arizona) and captured the towns of Mesilla, DoÝa Ana, and Tucson. General Henry H. Sibley, with 3,000 troops, now moved north against the Federal stronghold at Fort Craig on the Rio Grande.

Sibley's force collided with Union troops at Val Verde near Fort Craig on February 21, but the Yankees were unable to stop the invasion. Sibley left parts of his army to occupy Albuquerque and Santa Fe, and the rest of the troops headed east of Santa Fe along the Pecos River. Their next target was the Union garrison at Fort Union, an outpost on the other side of the Sangre de Cristo Mountains. At Pigeon's Ranch near Glorieta Pass, they encountered a Yankee force of 1,300 Colorado volunteers under Colonel John Slough. The battle began at 11:00 a.m., and the Federal force was thrown back before taking cover among the adobe buildings of Pigeon's Ranch. A Confederate attack late in the afternoon pushed the Union troops further down the pass, but nightfall halted the advance. Union troops snatched victory from the jaws of defeat when Major John Chivington led an attack on the Confederate supply train, burning 90 wagons and killing 800 animals.

With their supplies destroyed, the Confederates had to withdraw to Santa Fe. They lost 36 men killed, 70 wounded, and 25 captured. The Union army lost 38 killed, 64 wounded, and 20 captured. After a week in Santa Fe, the Rebels withdrew down the Rio Grande. By June, the Yankees controlled New Mexico again. The Confederates did not return for the rest of the war.

1865 - At City Point, Virginia, U.S. President Lincoln met with Ulysses S. Grant, William T. Sherman and Admiral David Dixon Porter.



March 28, 1979

Nuclear accident at Three Mile Island
At 4 a.m. on March 28, 1979, the worst accident in the history of the U.S. nuclear power industry begins when a pressure valve in the Unit-2 reactor at Three Mile Island fails to close. Cooling water, contaminated with radiation, drained from the open valve into adjoining buildings, and the core began to dangerously overheat.

The Three Mile Island nuclear power plant was built in 1974 on a sandbar on Pennsylvania's Susquehanna River, just 10 miles downstream from the state capitol in Harrisburg. In 1978, a second state-of-the-art reactor began operating on Three Mile Island, which was lauded for generating affordable and reliable energy in a time of energy crises.

After the cooling water began to drain out of the broken pressure valve on the morning of March 28, 1979, emergency cooling pumps automatically went into operation. Left alone, these safety devices would have prevented the development of a larger crisis. However, human operators in the control room misread confusing and contradictory readings and shut off the emergency water system. The reactor was also shut down, but residual heat from the fission process was still being released. By early morning, the core had heated to over 4,000 degrees, just 1,000 degrees short of meltdown. In the meltdown scenario, the core melts, and deadly radiation drifts across the countryside, fatally sickening a potentially great number of people.

As the plant operators struggled to understand what had happened, the contaminated water was releasing radioactive gases throughout the plant. The radiation levels, though not immediately life-threatening, were dangerous, and the core cooked further as the contaminated water was contained and precautions were taken to protect the operators. Shortly after 8 a.m., word of the accident leaked to the outside world. The plant's parent company, Metropolitan Edison, downplayed the crisis and claimed that no radiation had been detected off plant grounds, but the same day inspectors detected slightly increased levels of radiation nearby as a result of the contaminated water leak. Pennsylvania Governor Dick Thornburgh considered calling an evacuation.

Finally, at about 8 p.m., plant operators realized they needed to get water moving through the core again and restarted the pumps. The temperature began to drop, and pressure in the reactor was reduced. The reactor had come within less than an hour of a complete meltdown. More than half the core was destroyed or molten, but it had not broken its protective shell, and no radiation was escaping. The crisis was apparently over.

Two days later, however, on March 30, a bubble of highly flammable hydrogen gas was discovered within the reactor building. The bubble of gas was created two days before when exposed core materials reacted with super-heated steam. On March 28, some of this gas had exploded, releasing a small amount of radiation into the atmosphere. At that time, plant operators had not registered the explosion, which sounded like a ventilation door closing. After the radiation leak was discovered on March 30, residents were advised to stay indoors. Experts were uncertain if the hydrogen bubble would create further meltdown or possibly a giant explosion, and as a precaution Governor Thornburgh advised "pregnant women and pre-school age children to leave the area within a five-mile radius of the Three Mile Island facility until further notice." This led to the panic the governor had hoped to avoid; within days, more than 100,000 people had fled surrounding towns.

On April 1, President Jimmy Carter arrived at Three Mile Island to inspect the plant. Carter, a trained nuclear engineer, had helped dismantle a damaged Canadian nuclear reactor while serving in the U.S. Navy. His visit achieved its aim of calming local residents and the nation. That afternoon, experts agreed that the hydrogen bubble was not in danger of exploding. Slowly, the hydrogen was bled from the system as the reactor cooled.

At the height of the crisis, plant workers were exposed to unhealthy levels of radiation, but no one outside Three Mile Island had their health adversely affected by the accident. Nonetheless, the incident greatly eroded the public's faith in nuclear power. The unharmed Unit-1 reactor at Three Mile Island, which was shut down during the crisis, did not resume operation until 1985. Cleanup continued on Unit-2 until 1990, but it was too damaged to be rendered usable again. In the more than two decades since the accident at Three Mile Island, not a single new nuclear power plant has been ordered in the United States.

I've always been intrigued with Glorieta Pass, especially since it was early in the war.  Any good movies made on it?