Many a military manuals have been written in the history of man. The rules of engagement written and discussed by men from bygone eras until now have developed this study into the modern rules of war. The question of Islamic contribution and thinking on this highly important especially now in the volatile environment of the 21st century. This topic is important to understanding the dynamics of conflicts especially when Muslims are involved. Is there legitimacy in using torture tactics during war? Can Muslims tax sex slaves from the enemy? Is the targeting of civilians proper? What of the legality of child soldiers? These HOT questions and many more controversial topics are discussed in detail in this contemporary classic masterpiece of Sayyid Maududi - a renowned contemporary scholar. For a researcher, a book containing comprehensive material of this caliber was rarely available for understanding the Islamic rules of war. And to have an English translation of it is even rarer. The grand question of if Islam allows certain things or not during war becomes quite clear from this easy read.