Legalism was the primary philosophy used within the qin dynasty
World War I completely changed the way wars were fought.
Trench warfare, which was the norm just a century ago was seen as an nonviable strategy.
Modern machines such as tanks and airplanes made trench warfare mostly about keeping ground and resulted in stalemates.
Also, it was the first time that modern tanks, planes and machine guns were being used for first time at such a large scale, resulting in an unprecedented level of death and carnage.
Military generals soon realized that time-honored military code of conducts were now obsolete and a completely new form of strategy was now required.
My guess is b. Muhammad tughluq...... Sorry if it's wrong but I really think it is b.
The correct answer is Head Diplomat.
Many are the roles of a Foreign Policy Leader (also known as a Head Diplomat or Chief Diplomat), such as recognizing the legitimacy of a foreign nation, appointing ambassadors, establishing foreign policies, making treaties, making executive agreements. In the United States, the president is also the Chief Diplomat.
According to political scientist Brian R. Dirck, the most famous executive order was by President Abraham Lincoln, when he issued the Emancipation Proclamation on January 1, 1863: The Emancipation Proclamation was an executive order, itself a rather unusual thing in those days.
