? Chapter?28.2,?29.1:?Defeat?of?the?Axis,?The?Origins?of?the?Cold?War? ? Luftwaffe? German?air?force.?Relocated?much?of?its? strength?in?Germany?&?engage?ally?forces.? Became?a?less?formidable?obstacle?to?allies.? D?Day,?Normandy?(June?6,?1944)? Cotentin?Peninsula.?Airplanes?&?battleships? bombarded?Nazis,?4,000?vessels?landed? troops?and?supplies.?German?forces? dislodged?from?whole?Normandy?coast.? Radar?and?sonar? Radio?detection?and?ranging.?Sound? navigation?and?ranging.?Technique?used?to? navigate?underwater.? Ultra?and?Magic? Sophisticated?German?coding?device.?Allies? broke?the?most?secret?German?codes.? General?Dwight?D.?Eisenhower? Supreme?Commander?of?the?allied?forces? sent?out?his?armada?(warships)?into?D?Day.?