Complex sentence: The first such match was played in 1976 but did not become a regular fixture until the late 1980s and was also punctuated in the 1990s' by the Super League war.
Split into simpler sentences: The first such match was played in 1976 but did not become a regular fixture until the late 1980s. It was also punctuated in the 1990s' by the Super League war.