25 Dollars - Elizabeth II 6th Portrait - 80th Anniversary of the Battle of Britain - Gold Proof

The Battle of Britain ran from July to October 1940, and its eightieth anniversary fell during a year when commemorative coin programs worldwide were disrupted by COVID-19 minting shutdowns — making 2020 Perth Mint proof issues smaller in realized mintage than their authorized maximums more often than not. The campaign itself was the first major military operation in history fought entirely by air forces, and its outcome rested on a margin thin enough that Fighter Command was within days of structural collapse when Luftwaffe targeting shifted from RAF airfields to London in early September — a strategic error that bought the British just enough time to recover.