The ability of Lasers to generate every high radiation density at remote distances with high precision has made it ideally suited for a variety of applications both in civil and defence areas. While some of the techniques have been evolutionary, some other aspects have led to revolutionary applications. Like many other dual use technologies, rapid growth in Laser technology owes a lot to military research. Hence a brief review of 'Lasers and Defence' is considered appropriate at the turn of the century. Specifically, the direct use of Laser energy offers new optics for Electro- Optic Counter Measures and the High Power Lasers have proved successfully the potential use of Directed Energy Weapon for missile defence and other strategic applications. The technology is ripe to make a major impact in the coming new millennium. The paper present a brief review of this technology as applicable to defence with comments on future potentials.