World history would make the 1940s as the decade of war, starting with the Nazi invasion of Poland in September 1939 and ending with the descent into a conflict that left the planet cold with fear at times. On the racetrack, the decade was one of Triple Crown winners – four in total, the most of any decade so far – yet those years were rich with great performances, a long list of great horses vying for the hearts and minds of the fans that stood trackside.