World war, 1914-1918, aerial operationsGermany, luftwaffeMilitary art and scienceWorld war, 1939-1945, aerial operationsWorld war, 1939-1945, aerial operations, germanAirplanes, militaryFighter planesPapua new guinea, historyWorld historyWorld war, 1914-1918, germanyWorld war, 1914-1918, great britainWorld war, 1939-1945, campaigns, new guineaWorld war, 1939-1945, pictorial worksAerial observation (Military science)AeronauticsAeronautics, germanyAeronautics, pictorial worksAirplanesArmored vehicles, militaryBombersDornier Do 24 (Seaplane)Fighter pilotsGerman Aerial operationsGreat britain, history, 20th centuryHeinkel 177 (bomber)