When did the AFL teams come into the AFL?

Answer 1

west coast 1987, Brisbane 1987, Adelaide 1991, fremantle 1995, port 1997

swans were already a Melbourne team but moved to sydney sometime in the 80s

Answer 2

The fist teams to join the AFL, were introduced in 1897, there were about 6 teams at the time. The rest of the teams joined toe league between then and now.