Air supremacy
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Aerial supremacy is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of command of the sea.
Box formation of B-17 bombers from 384th Bomb Group, 1 September 1944
A 2,000 lb. bomb "near-miss" severely damages Ostfriesland at the stern hull plates in the Project B demonstration of naval air power.
Royal Air Force Supermarine Spitfires before the Battle of Britain
361st Fighter Group P-51D Mustangs of the Eighth Air Force heading out on an air supremacy mission over Nazi Germany
Western Front (World War I)
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The Western Front was one of the main theatres of war during the First World War. Following the outbreak of war in August 1914, the German Army opened the Western Front by invading Luxembourg and Belgium, then gaining military control of important industrial regions in France. The German advance was halted with the Battle of the Marne. Following the Race to the Sea, both sides dug in along a meandering line of fortified trenches, stretching from the North Sea to the Swiss frontier with France, the position of which changed little except during early 1917 and again in 1918.
French bayonet charge (1913 photograph)
German infantry on the battlefield, 7 August 1914
German trench on the Western Front, 1915.