Stallions is the plural.Stallion is the singular.
Like any other stallions do.
Birmingham Stallions was created in 1983.
Birmingham Stallions ended in 1985.
Boise Stallions ended in 2001.
Boise Stallions was created in 1999.
Dallas Stallions ended in 1999.
Dallas Stallions was created in 1999.
Doncaster Stallions was created in 1969.
Houston Stallions was created in 2010.
Oklahoma Stallions was created in 2010.
Augusta Stallions ended in 2002.