Great Britain over Canada, Hockey, Garmisch-Partenkirchen 1936
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After winning the first six Olympic gold medals, Canada looked to cruise again in Germany. But the UK, not exactly known as a hockey powerhouse, stacked its roster with second-tier Canadians and took advantage of a wonky round-robin tournament format to pull off the shocker. The Brits haven't had a qualifying hockey team for the Olympics since 1948.