What were the 1970's Dallas Cowboys team nicknames?

Answer 1

Early in the '70s (before defeating the Dolphins in Super Bowl VI) they were known as "Next Year's Champions", from a book by the same name published in 1969.

Later in the '70s they were known as "America's Team", taken from the title of the '78 season high-light video, produced by Bob Ryan of NFL Films.

And as Guest4122 stated, the defense was also known as the "Doomsday Defense".

Answer 2

Early in the '70s (before defeating the Dolphins in Super Bowl VI) they were known as "Next Year's Champions", from a book by the same name published in 1969.

Later in the '70s they were known as "America's Team", taken from the title of the '78 season high-light video, produced by Bob Ryan of NFL Films.

And as Guest4122 stated, the defense was also known as the "Doomsday Defense".