Lieutenant Jeremy F. Gilmer established the fort as the first army installation in the Southwest to protect soldiers from a possible local uprising.
Following a design, walls five feet thick and nine feet high were constructed using a mixture of earth, water, and fragments of ceramics and stone. The fort was star-shaped, with a semi-subterranean magazine for storing gunpowder and an adobe guardhouse. Each corner of the fort had a view of and was within firing range of the town of Santa Fe.
Fort Marcy was a symbolic reminder to residents that the troops of the United States of America were in New Mexico to stay, although its barracks were never occupied; as soon as it was built, the walls began to erode.
Today, these ruins are earthen mounds outlining the original foundations of the fort. Indentations surrounding the complex recall the eight-foot-deep ditch around the fort’s perimeter, from which one could fire in all directions. The elevated point retains the experience of a panoramic view of the city.
