This outpost did not see any fighting for the time being, but it provided the site for what later was regarded as one of the decisive moments of the war. In September 1861, General Beauregard had established his headquarters at Fairfax Court House, and urgently pressed the newly-formed government of Confederate President Jefferson Davis for reinforcements with which to sweep into Pennsylvania and Maryland and, hopefully, to carry the Federal capital itself. A meeting was arranged at Beauregard's headquarters in which Davis, Generals Beauregard and J. J. Johnston, and certain of their trusted staff officers considered this plan. Their decision was to adopt a defensive posture and protect the borders of Virginia rather than take the offensive and invade the North. As events turned out, this decision had consequences of the greatest effect, for it was not until Lee marched out of the Valley on the road to Gettysburg in 1863 that there was another opportunity for the Confederacy to carry the war to the soil of the northern states.[87] In the spring of 1862, the Confederate army retired from Fairfax Court House, and soon after that its line of fortifications at Centreville--the most extensive system of field fortifications in military history up to that time--was abandoned. As the Union armies took the initiative in their repeated efforts to reach Richmond, the crossroads at Fairfax Court House had key importance in the communication and supply systems of these forces. From 1862 to the end of the war, Union troops remained in control of the crossroads and the courthouse. Contemporary photographs of the building show it being used as a lookout point and station for patrols. Other descriptions indicate that the courthouse was loopholed,[88] the furnishings were removed, and the interior generally was gutted so that only the walls and roof remained.[89] For all practical purposes, the courthouse and its related buildings were, in the years 1863 and 1864, a military outpost and minor headquarters in the Union army's system to protect its supply and communications lines from the irregular troops who kept hostilities constantly smoldering in Northern Virginia. Throughout the western part of Fairfax County, and in Loudoun, Fauquier and Prince William Counties, lived many who gave the appearance of innocent farmers during the daylight hours, but who changed into Confederate uniforms at night and on weekends to ride against isolated outposts or supply points of the Union army or destroy vulnerable bridges and communications centers.