The US has been independent since it's founding in 1776.
Brazil have been existing for many years, the team was there before the 1930 world cup even.
The US has been independent since July 4, 1776.
Oman has been a country for about 800 years.
many
Zero
The Vatican has been the traditional home of the pope for many hundreds of years.
42 years of independent
Guyana became independent on May 26, 1966. As of 2023, it has been 57 years since Guyana gained its independence.
Russians where a minority resented by the majority in the newly independent nations
Brazil has been in every 16 world cups that were held.
Once in 1958 against Brazil. Brazil won.