CSA assassins monitored the homes of their targets, practiced mock assassinations of these targets with scoped rifles, and practiced attacks in a mock residential training facility known as Silhouette City. The 224 acre property on Bull Shoals Lake in Marion County, Arkansas, that the CSA operated from until the group's collapse in 1985 was purchased by Ellison from the Campus Crusade for Christ in 1976. In 1983, suffering financially, especially after Randall Rader's defection to the Order, the CSA stopped making payments on the mortgage, and on December 20, the bank foreclosed, selling the property back to the Campus Crusade. The group, however, squatted on the land, mounting regular armed patrols to intimidate the local sheriff, who continuously delayed their eviction. The perimeter of the CSA compound had 100, 200, and indicator plates nailed to trees to allow the defenders to adjust their sights accordingly to engage attackers. The central rallying point in the event of an attack was a concrete bunkhouse that housed the communications radios next to the tower, which was constructed for defense. The perimeter of the compound had built-in bunkers for one to three men, and each was numbered as a post and assigned to individuals as an area of responsibility.