Wikipedia lists the only previously cancelled Olympics as 1916 (WWI) and 1940 and 1944 (WWII).<p>Source: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Category:Cancelled_Olympic_Games" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Category:Cancelled_Olympic_Gam...</a>