During the Battle of Britain's critical late-August phase, RAF Fighter Command and the German Luftwaffe fought fierce engagements over southeastern England, with both sides suffering heavy aircraft losses. These weeks of attrition against RAF airfields and radar stations tested Britain's air defenses to their limit and ultimately forced Hitler to postpone Operation Sea Lion indefinitely.
By late August 1940, the Luftwaffe had shifted from probing coastal shipping to a sustained assault on RAF airfields, radar stations, and aircraft factories, hoping to destroy Fighter Command before any invasion of Britain. Young pilots, some barely out of flight school, were flying four or five sorties a day, snatching sleep on cots beside their Hurricanes and Spitfires.
The strain on both sides was immense: RAF fighter losses were running ahead of production some weeks, and Air Chief Marshal Hugh Dowding's dogged husbanding of reserves became one of the unsung strategic triumphs of the war. Meanwhile, German bomber crews faced mounting losses without achieving the knockout blow Hermann Göring had promised.
Winston Churchill's tribute that 'never was so much owed by so many to so few' captured a campaign fought largely by young men in their early twenties, deciding within a few miles of English sky whether Britain would be invaded at all.