<P> The game itself continued to evolve during this time . Numerous innovations to the rules and equipment were put forward as the NHL sought to improve the flow of the game and make the sport more fan - friendly . The NHL played with six men to a side rather than the traditional seven, and was among the first leagues to allow goaltenders to leave their feet to make saves . The NHL's footprint spread across Canada as Foster Hewitt's radio broadcasts were heard coast - to - coast starting in 1933 . </P> <P> The Montreal Forum and Maple Leaf Gardens were built, and each played host to All - Star benefit games held to raise money to support Ace Bailey and the family of Howie Morenz in Toronto and Montreal, respectively . Both players' careers had ended due to an on - ice incident, with Morenz eventually dying, a month after he sustained his initial injury . These early NHL All - Star games would lead to the annual All - Star games which continue today . </P> <P> The Great Depression and World War II reduced the league to six teams by 1942 . Founding team Ottawa, and expansion teams New York Americans, Montreal Maroons and Pittsburgh Pirates / Philadelphia Quakers passed from the scene . Expansion team Detroit Falcons declared bankruptcy in 1932 and only survived through a merger with the Chicago Shamrocks of the American Hockey League and the pockets of prosperous owner James Norris to become the Detroit Red Wings . Desperate conditions in Montreal meant that the city nearly lost both of its teams in the 1930s; the Canadiens nearly moved to Cleveland, but survived due to its stronger fan support . The six teams left standing in 1942 (the Boston Bruins, Chicago Black Hawks, Detroit Red Wings, Montreal Canadiens, New York Rangers and Toronto Maple Leafs) are known today as the "Original Six". </P> <Table> <Tr> <Td> Part of a series on the </Td> </Tr> <Tr> <Th> History of the NHL </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Th> National Hockey League </Th> </Tr> <Tr> <Td> <Ul> <Li> Founding (1917--1942) </Li> <Li> Original Six (1942--1967) </Li> <Li> Expansion era (1967--1992) </Li> <Li> Modern era (1992--present) </Li> </Ul> </Td> </Tr> <Tr> <Td> Ice hockey portal </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table>

What impact did the great depression have on hockey