have there been any incidents of boycott?
Yes - There were three boycotts of the 1956 Melbourne Olympics: the Netherlands, Spain, and Switzerland refused to attend because of the repression of the Hungarian uprising by the Soviet Union.
Olympic Games
There were three boycotts of the 1956 Melbourne Olympics: the Netherlands, Spain, and Switzerland refused to attend because of the repression of the Hungarian uprising by the Soviet Union, but did send an equestrian delegation to Stockholm; Cambodia, Egypt, Iraq, and Lebanon boycotted the Games because of the Suez Crisis; and the People's Republic of China boycotted the Games due to the participation of the Republic of China, composed of athletes coming from Taiwan.

In 1972 and 1976 a large number of African countries threatened the IOC with a boycott to force them to ban South Africa and Rhodesia, because of their segregationist rule. New Zealand was also one of the African boycott targets, because its national rugby union team had toured apartheid-ruled South Africa. The IOC conceded in the first two cases, but refused to ban New Zealand on the grounds that rugby was not an Olympic sport. Fulfilling their threat, twenty African countries were joined by Guyana and Iraq in a withdrawa
why olympic games are regarded as global events Thousands of athletes from around the world participate in the competitions from more than 200 nations. when did these games start? 1896 how does it benefit host cities? It increases the host country's exports, as the host or candidate country sends a signal about trade openness when bidding to host the Games. It has a strong positive effect on the philanthropic contributions of corporations headquartered in the host city, which seems to benefit the local nonprofit sector.
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Olympic Games [SEP] Boycotts
Greece, Australia, France, and United Kingdom are the only countries to be represented at every Olympic Games since their inception in 1896. While countries sometimes miss an Olympics due to a lack of qualified athletes, some choose to boycott a celebration of the Games for various reasons. The Olympic Council of Ireland boycotted the 1936 Berlin Games, because the IOC insisted its team needed to be restricted to the Irish Free State rather than representing the entire island of Ireland. There were three boycotts of the 1956 Melbourne Olympics: the Netherlands, Spain, and Switzerland refused to attend because of the repression of the Hungarian uprising by the Soviet Union, but did send an equestrian delegation to Stockholm; Cambodia, Egypt, Iraq, and Lebanon boycotted the Games because of the Suez Crisis; and the People's Republic of China boycotted the Games due to the participation of the Republic of China, composed of athletes coming from Taiwan.