In this paper we would like to summarize the United States Army Chemical, Research, Development and Engineering Center (CRDEC) development of an advanced laser standoff (remote) chemical detection system for multiple use in the modern battlefield. We will first discuss the overall program including its goals, purpose, objectives and capabilities. Next we will review the basic detection principles on which this program is based. This includes Differential Absorption Lidar (called DIAL), Differential Scattered Lidar (called DISC), Topographic Reflection for surface detection and Range Resolution for DIAL and DISC. The third and fourth areas of the paper will be a brief discussion of the existing breadboard Lidar system and its field test goals and accomplishments. To conclude we will say a few words about our future program direction.