At the 1920 Summer Olympics held in Antwerp, 29 athletics events were contested, all for men only. The competitions were held from August 15, 1920 to August 23, 1920.
Participating nations
509 athletes from 25 nations competed. Czechoslovakia, Egypt, Estonia, Monaco, New Zealand, and Spain competed for the first time.
References
Athletics at the 1920 Summer Olympics Wikipedia(Text) CC BY-SA