The MOLLUS monument is at the Landram House site, at the end of a walking trail about 1,000 yards from the parking lot at Tour Stop Three. (38.228126° N, 77.59338° W; map)

The Military Order of the Loyal Legion of the United States (known as MOLLUS, or the Loyal Legion) is a patriotic order made up of the descendents of officers of the United States Army, Navy and Marine Corps who served in the CIvil War.

From the monument:

These one hundred and sixty-two acres, known as the Landram Farm, were presented to the Fredericksburg and Spotsylvania National Military Park by the Military Order of the Loyal Legion of the United States commandery of the State of Pennsylvania and dedicated on May 11th, 1940 to the memory of the valiant men who fought here.