Short answers, pulled from the story.
The Basketball Association of America launched its first season on the 1st of November 1946. This date marked the start of play with eleven teams ready to compete under a sixty-game schedule.
Ossie Schectman scored the very first basket in league history during the opening game against the Toronto Huskies. His shot occurred inside Maple Leaf Gardens on the 1st of November 1946 and is recognized by the NBA as the first basket in its timeline.
Four original franchises folded before the second season including the Detroit Falcons, Cleveland Rebels, Pittsburgh Ironmen, and Toronto Huskies. All members of the Western Division had vanished by 1950 after playing just one or two seasons.
A sixty-game schedule defined the regular season for every franchise in the Basketball Association of America. Eleven organizations signed on to play under this new set of rules while competing across Eastern and Western divisions.
The Philadelphia Warriors defeated the Chicago Stags four games to one to claim the title. This victory made the Warriors the first BAA Champions and determined the champion of the inaugural season.