PRESTON Diana,  1952- <br/><br/>
A higher form of killing :  six weeks in World War I that forever changed the nature of warfare / 
Diana Preston. 
 - New York :  Bloomsbury Press,  2015. 
 - 340 pages , 16 unnumbered pages of plates : ills, portraits, maps ; 25 cm. 
<br/><br/>Includes bibliographical references (pages 315-324) and index. 
<br/><br/> Each of these actions violated rules of war carefully agreed at the Hague Conventions of 1898 and 1907. Though Germany's attempts to quickly win the war failed, the psychological damage caused by these attacks far outweighed the casualties. 
<br/><br/><label>ISBN: </label>9781620402122 (hbk.) :  17.99GBP 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GERMANY -- ARMED FORCES -- WEAPONS SYSTEM<br/>ARMED FORCES -- WEAPONS SYSTEM<br/>MILITARY OPERATIONS, NAVAL -- SUBMARINE