A study of the history of mine warfare at sea from the earliest days to the present time, this work should be of interest to military lawyers and to all those concerned with the conduct and control of warfare. At the technical level, it is intended for laymen. While there is a chapter dealing with many technical matters relating to both mine warfare at sea and mine countermeasures, the sole purpose of that chapter is to give the non-technician, whether naval officer or civilian, a basic understanding of various categories of sea mines and their accessories and of mine countermeasure gear.