At the 1964 Summer Olympics in Tokyo, eighteen swimming events were contested, ten for men and eight for women. There were a total of 405 participants from 42 countries competing. For the first time, the 4 × 100 metres freestyle relay for men and... Wikipedia
Dates: Oct 11, 1964 – Oct 18, 1964
4x100m medley relay Women: United States, Netherlands, and Soviet Union