How did new technologies impact the nature of warfare and affect the course and outcome of the war?​

Perhaps the most significant technological advance during World War I was the improvement of the machine gun, a weapon originally developed by an American, Hiram Maxim. ... They also developed air-cooled machine guns for airplanes and improved those used on the ground, making them lighter and easier to move.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

cultural/diplomatic relations. most medieval japanese   culture has chinese origins. writing, architecture etc.