#3 German soldiers generate power to inflate an observation balloon, 1914.

German soldiers generate power to inflate an observation balloon, 1914.

Military Observation Balloons of WWI: Before Satellites And Drones, these Hot Air Balloons Were Used For Surveillance

#3 German soldiers generate power to inflate an observation balloon, 1914.

WWI

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#13 German troops saw tree trunks in the Argonne, for use in dug-outs and trenches.

#40 Belgian Refugees leaving the cities for Holland and England, 1916.

#28 Austrian soldiers descend a cliff. 1915.

#15 Donald Roy McKinnon, born 1898

#8 A woman ‘land girl’ driving a tractor ploughing a field, 1918.

#10 A closer look at the murals lining the avenue.

#61 An Algerian worker in Noyo, France after the retreat of the Germans, 1917