Before revision: Before the schisms 250px|Rochdale Hornets team of 1875, one of the early rugby football clubs that then switched to rugby league Although many forms of football had been played across the world, it was only during the second half of the 19th century that these games began to be codified.
After revision: Rugby union before the schisms 250px|Rochdale Hornets team of 1875, one of the early rugby football clubs that then switched to rugby league Although many forms of football had been played across the world, it was only during the second half of the 19th century that these games began to be codified.