Fort Union, Field of Standing Walls

Near the town of Watrous, in the ranch country of northeastern New Mexico, a gravel road leaves the highway and runs out across the shortgrass prairie. West, the Sangre de Cristo Mountains hold a blue line against the sky. North, the tableland rolls toward Colorado. It is dry, open country — juniper, chamisa, a wind that appears to have no stopping place and uses the whole sky for its running.

The walls appear at a distance. They are the same pale tan as the ground, so the ruin does not so much rise from the landscape as surface from it. A rectangle of adobe, long and low — a field of standing walls, doorways that open on air and grama grass.

A walking path loops through the remains of the army's principal supply depot in the Southwest. The walls stand shoulder-high along the old storehouses, then drop to foundation lines, then rise again as a chimney. The fort keeps its plan — parade ground, headquarters, barracks, hospital, corrals — a town spelled out in mud and vacancy. Signs name what stood here; the buildings themselves are mostly air, with a few stubborn courses of brick for spine. Nothing is roofed. Nothing is whole. And yet nothing has entirely gone.

The junction and the wagon road

Before the railroad, the Santa Fe Trail was the commercial spine of the Southwest. Wagons left the Missouri River towns loaded with what an industrial nation made — cloth and kettles and rifles, paper and nails and coffee — and came back months later loaded with what New Mexico had to trade: wool, hides, silver, mules. The trail was never a single road. It was a braid of wagon roads across the plains, and for long stretches it ran in two branches — one short and waterless across the Cimarron country, one long and mountainous around Raton. The branches came back together where the Mora River runs off the high country, at a place people called La Junta — the junction — before the town took the name Watrous. On the bench of prairie above that meeting of routes, Fort Union was established in 1851.

It was never a castle with walls and towers. It was a depot with guns. The army's work was to keep the road open, to escort the mail, and to hold enough stores to supply the scattered posts of New Mexico. Around the warehouses gathered wagon yards, smithies, and the raw working population of the trail — teamsters, bullwhackers, mule skinners, traders, laundresses, gamblers. The fort was where the trail paused, counted its animals, mended its harness, and decided whether to go on. Out on the surrounding prairie the wagon ruts are still there, two grooves running off toward the horizon as if the wagons had passed yesterday.

Three times a fort

The first Fort Union was a hurry of timber and adobe, thrown up on the open prairie and never meant to last. Its walls were never walls in the military sense; they were storage sheds and barracks under one roof, a quartermaster's camp that happened to be garrisoned. The second fort came in 1861, when the Civil War reached for New Mexico. Confederate columns from Texas pushed up the Rio Grande valley, intending to take Santa Fe and, beyond it, the Colorado gold fields. The road to that prize ran through Fort Union and its warehouses.

In the spring of 1862, in the mountains east of Santa Fe, Union volunteers — many of them Colorado miners turned soldiers — met the Texans at Glorieta Pass in a battle that turned the campaign. The Confederates did not lose the field, but they lost their supply train, and an army without supplies on the high plains does not advance. It went back to Texas. Fort Union's walls were never tested by an enemy. The enemy that eventually took the fort was time.

With the war over, the army rebuilt the post the way it should have been built from the beginning. Adobe bricks were made on the spot — earth dug from the site, mixed with water and straw, pressed in wooden molds, dried in the sun — and raised into storehouses, barracks, officers' quarters, and the great quartermaster depot that anchored one end of the parade ground. The bricks came from the ground the fort stood on, which is why the ruin and the grassland share a color. The post grew into a small town, ordered inside the walls and unruly just outside them, until the railroad made the whole arrangement obsolete.

The railroad and the leaving

The Atchison, Topeka and Santa Fe came down through Raton Pass in the late 1870s, laying steel along the old mountain branch of the trail. The arithmetic was brutal: a wagon team could cross the plains in months, a locomotive in days. One by one the trade goods left the wagons for the boxcars. The trail traffic dried up, and the fort, which existed for the trail, lost its reason for being. The army decommissioned Fort Union in 1891.

What followed was not siege but salvage. Doorframes, floors, windows, and iron went off to the ranches and towns of the region. Timber enough to build houses was carried away in wagons of its own. The adobe stayed — too massive to move, too humble to want. The prairie moved back around the walls. The fort became what it had been under its coats of mud plaster all along: a field of standing walls on the shortgrass, a shape the road had passed through. Midway through the twentieth century the ground was set aside as a national monument, and the walking trail now runs where the wagon yards ran.

A rectangle the prairie keeps

Adobe is the most perishable of building materials and the most patient. It is earth and water and straw, dried into bricks and laid in the sun, and the moment it stops being repaired it begins the slow work of going home. The walls of Fort Union have been going home for more than a century. In the dry air of northeastern New Mexico the melt is slow. Rain etches the faces, wind rounds the tops, and the walls slump grain by grain into the same ground they were lifted from. Some sections have dissolved to mounds that could be mistaken for natural swellings of the earth. Others still stand tall enough to cast a long evening shadow, and those are the ones the eye keeps returning to.

The ruins open to every season. Snow crosses the shortgrass and piles in the roofless rooms. Summer thunder stands over the mountains and passes without breaking. The doorways face a wind that never quits. In the fall the chamisa turns the ditches gold, and the adobe walls take that same light and hold it until dark. Through it all the walls keep their color — the color of the ground itself — so that at dusk the fort looks less like a building than like the prairie holding the memory of its own geometry.

Nothing in the West is left so honestly alone. Other forts became towns, became prisons, became tourist streets with shops in the barracks. Fort Union became a field. The road that fed the West is gone, its ruts grown over. The railroad that ended the wagon era still runs somewhere below the rim, and the highway crosses the valley, but neither pays the fort any mind. The walls remain, a rectangle open to the sky, and the wind moves through their doorways the way it once moved through a thousand wagon camps — indifferent, tireless, and, like the fort, still here.

Fort Union National Monument

Photos: Eric T Gunther (CC BY 3.0)