Uruguay and Argentina boycott the 1938 World Cup
Defending champion Uruguay and South American power Argentina both refused to enter the 1938 World Cup in France, protesting FIFA's decision to hold a second consecutive tournament in Europe after promising to alternate between continents. Uruguay became the only defending champion to not defend its title.
The 1938 tournament went ahead with a reduced field. World War II then suspended the World Cup for 12 years.
FIFA eventually adopted rotation and bidding systems intended to distribute the tournament more equitably across continents, though controversies over hosting decisions have persisted.
The 1938 boycott was a protest against the host selection itself. Iran's withdrawal is driven by a military conflict with the host nation—a more extreme version of the same tension between sports and geopolitics.
