This changed in 1933 when the NFL introduced a league championship game .
It was this league championship game that the Packers first won in 1936 ( 21 - 6 over the Boston Redskins ) and again this year , 1939 .
This changed in 1933 when the NFL introduced a league championship game , and it was this league championship game that the Packers first won in 1936 ( 21 - 6 over the Boston Redskins ) and again this year , 1939 .