The ABA only existed from 1967 to 1976, but had a major impact on the history of professional basketball. This year’s conference finals feature two former ABA franchises, the Indiana Pacers and the San Antonio Spurs. There’s a chance that 2 old ABA teams could meet in the finals for only the second time since the merger.

Here’s a brief history of the league that gave us the three point shot and the red, white, and blue basketball: