2)- German U-boat attacks on merchants ships inthe Atlantic were a serious threat to the Allied war effort. American Vice Admiral William S. Sims convinced the British to try the convoy system, in which a heavy guard of destroyers escortedmerchant ships back and forth across the Atlantic in groups. By fall of 1917, shipping losses had been cut in half.
3)- Radar, guided missiles, nuclear submarines, reconnaissance satellites, atomicbombs--the inventions of the 20thcentury seem intended mainly for war, with the usual dreaded result. But these technological developments have also had far-reaching applications in peacetime. Because theinnovations were originally intended for the battlefield, they were developed quickly and with a narrow purpose. However, their applications during peacetime had lead to life-enhancing benefits that willextend far into the 21st century.
WORLD WAR 1: 1914-1918 ¨Fighter Planes to Commuter Flights¨
Airplanes were first used to gather military information but were soon put to work as fighters and...