Short answers, pulled from the story.
The American Football League (AFL) of 1936 was a professional American football league that operated during the 1936 and 1937 seasons in direct competition with the National Football League. It was conceived by Harry March, former personnel director of the New York Giants, who announced plans for the league on the 12th of November, 1935.
The Cleveland Rams are the only team from the 1936 AFL still in existence. They left the AFL after one season when the NFL agreed to expand and accept Cleveland as a franchise, and they continue today as the Los Angeles Rams.
The Los Angeles Bulldogs were a professional football team that joined the 1937 AFL after the NFL rejected their application. Coached by Gus Henderson, they finished the 1937 season with a perfect 8-0 record, becoming the first professional football team to win a league championship without a loss or a tie. That feat was not matched until eleven years later by the Cleveland Browns of the AAFC.
The league collapsed at the end of the 1937 season due to a combination of factors: low attendance in Pittsburgh, which averaged only 2,500 fans per home game; player defections to the NFL that devastated teams like the Boston Shamrocks; and a severe competitive imbalance caused by the Los Angeles Bulldogs winning every game. Owner Bill Scully reported that the Shamrocks alone lost $37,000 in 1937.
At the Syracuse Braves' lone home game in Red Wing Stadium on the 1st of November, 1936, Braves players demanded back pay and delayed the start of the second half by 40 minutes. The game was eventually completed, but the franchise folded immediately after it ended.
Sid Gillman played for the Cleveland Rams in the 1936 AFL season as a rookie end, the only season he was an active professional player before going on to his career in coaching and management.