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In page Chicago Bears:

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Soldier Field, located on Lake Shore Drive in Chicago, is the home of the Bears. The Bears moved to Soldier Field in 1971 after outgrowing Wrigley Field, the team's home for 50 years.[1] After the AFL-NFL Merger, the league preferred their teams to play in stadiums that could hold at least 50,000 fans. Even with portable bleachers that the team set up at Wrigley, the stadium could still only hold 46,000.[2] At first, the Bears were supposed to play at Dyche Stadium (later called Ryan Field), but Northwestern University's residential neighbors objected, and the agreement was cancelled. The original home of the Bears was Staley Field at Decatur, Illinois, when the team was known as the Decatur Staleys, before they moved to Chicago in 1921.[citation needed]