Marker is located inside the boundaries of Lewinsville Park and details the engagement that took place here on September 11, 1861. Union Brig. Gen. William F. "Baldy" Smith sent a force of about 1,800 men, accompanied by four guns, to conduct reconnaissance at Lewinsville. The soldiers, under the immediate command of Col. Isaac Stevens, left Camp Advance around 7:30 a.m. and arrived in the village about two and a half hours later. Around 2 p.m., the mission was complete, and recall was sounded. As the Union soldiers prepared for their return to camp, over 300 Confederates under the command of Col. J.E.B. Stuart launched an attack from the direction of Falls Church. Heavy artillery dueling ensued as the Union force fell back towards Washington. Smith himself arrived on the scene with two additional artillery pieces. Both sides claimed victory, and casualties were light.