The Nations Cup is a rugby union competition that was first held in 2006 at Estádio Universitário in Lisbon with Argentina A, Italy A, Portugal and Russia taking part. The tournament is part of the International Rugby Board's US $50 million Strategic Investment programme, which also includes the Pacific Nations Cup, the Pacific Rugby Cup and the Americas Rugby Championship.
The 2011 South American Rugby Championship "A" was the 33rd edition of the two tiered competition of the leading national rugby union teams in South America.
The 1961 South American Rugby Championship was the third edition of the competition of the leading national Rugby Union teams in South America.
The 1964 South American Rugby Championship was the fourth edition of the competition of the leading national Rugby Union teams in South America.
The 1969 South American Rugby Championship was the sixth edition of the competition of the leading national Rugby Union teams in South America.
The 1975 South American Rugby Championship was the ninth edition of the competition of the leading national Rugby Union teams in South America.
The 1977 South American Rugby Championship was the tenth edition of the competition of the leading national Rugby Union teams in South America.
The 1983 South American Rugby Championship was the 13th edition of the competition of the leading national Rugby Union teams in South America.
The 1987 South American Rugby Championship was the 15th edition of the competition of the leading national Rugby Union teams in South America.
The 1993 South American Rugby Championship was the 18th edition of the competition of the leading national Rugby Union teams in South America.
The 1995 South American Rugby Championship was the 19th edition of the competition of the leading national Rugby Union teams in South America.
The 1997 South American Rugby Championship was the 20th edition of the competition of the leading national Rugby Union teams in South America.
The 1998 South American Rugby Championship was the 21st edition of the competition of the leading national Rugby Union teams in South America.
The 2000 South American Rugby Championship was the 22nd edition of the competition of the leading national Rugby Union teams in South America.
The 2001 South American Rugby Championship was the 23rd edition of the competition of the leading national Rugby Union teams in South America.
The 2002 South American Rugby Championship was the 24th edition of the competition of the leading national Rugby Union teams in South America.
The 2005 South American Rugby Championship was the 27th edition of the competition of the leading national Rugby Union teams in South America.
The 2006 South American Rugby Championship was the 28th edition of the competition of the leading national Rugby Union teams in South America.
