Why did both sides begin to develop new technology in WWI?

Did remilitarization contribute to the outbreak of World War 2? What percent of soldiers die? Why did Japan want control of Manchuria? Where did The word pacifist come from? Who made the reconstruction act? What statement best describes the opposing sides in the Korean War? What if d day failed? Was oda nobunaga a samurai? Where is Charles Town in the 13 colonies? Who was the first allied power to surrender? Why did American soldiers use Agent Orange to detect Vietcong booby traps to disrupt the enemy and food supply to kill as many Vietcong guerrillas as possible to deter villages from harboring guer? How did the fighting group of soldiers heaven start? Why did men become coureurs de bois? How did General MacArthur misjudge the Chinese during the great war? Why was the war bonds important in world war 1? How did the military innovation shown in this photograph affect the course of world war i? In what year was the battle of Kinsale fought? How did the Missouri Compromise effect Massachusetts? List of American pows that survived the Japanese pow camps was the name vernon west on any of the lists? What country had the first bomber plane?