This book contains and critically processed materials from the world chemical literature on chemistry and technology of chemical warfare agents. The reader of this book should bear in mind that detailed production recipes and technological schemes for the production of BHV are the strictest secret of laboratories and industry of capitalist countries. Therefore, the descriptions of technological processes contained in the book, of course, suffer from a known incompleteness and, perhaps, do not always reflect the actual state of production of a particular BOP at the moment.