Growth

After the creation of the World Cup, the 1932 Summer Olympics, held in Los Angeles, did not plan to include football as part of the schedule due to the low popularity of the sport in the United States, as American football had been growing in popularity. FIFA and the IOC also disagreed over the status of amateur players, and so football was dropped from the Games. Olympic football returned at the 1936 Summer Olympics, but was now overshadowed by the more prestigious World Cup.
The issues facing the early World Cup tournaments were the difficulties of intercontinental travel, and war. Few South American teams were willing to travel to Europe for the 1934 and 1938 tournaments, with Brazil the only South American team to compete in both. The 1942 and 1946 competitions were cancelled due to World War II and its aftermath.
The 1950 World Cup was the first to include British participants. British teams withdrew from FIFA in 1920, partly out of unwillingness to play against the countries they had been at war with, and partly as a protest against foreign influence on football, but rejoined in 1946 following FIFA's invitation. The tournament also saw the return of 1930 champions Uruguay, who had boycotted the previous two World Cups. Uruguay won the tournament again in one of the most famous matches in World Cup history, which was later called the "Maracanazo".

In the tournaments between 1934 and 1978, 16 teams competed in each tournament, except in 1938, when Austria were absorbed into Germany after qualifying, leaving the tournament with 15 teams, and in 1950, when India, Scotland and Turkey withdrew, leaving the tournament with 13 teams. Most of the participating nations were from Europe and South America, with a small minority from North America, Africa, Asia and Oceania. These teams were usually defeated easily by the European and South American teams. Until 1982, the only teams from outside Europe and South America to advance out of the first round were: USA, semi-finalists in 1930; Cuba, quarter-finalists in 1938; Korea DPR, quarter-finalists in 1966; and Mexico, quarter-finalists in 1970.
The tournament was expanded to 24 teams in 1982, and then to 32 in 1998, allowing more teams from Africa, Asia and North America to take part. The one exception is Oceania, who have never had a guaranteed spot in the tournament. In recent years, teams from these regions have enjoyed more success, and those who have reached the quarter-finals include: Mexico, quarter-finalists in 1986; Cameroon, quarter-finalists in 1990; Korea Republic, finishing in fourth place in 2002; and Senegal and USA, both quarter-finalists in 2002. However, European and South American teams have remained the stronger forces. For example, the quarter-finalists in 2006 were all from Europe or South America.
198 nations attempted to qualify for the 2006 FIFA World Cup, and a record 204 will attempt to qualify for the 2010 FIFA World Cup.