Great article about Green Bay Packer fan George Halas
http://www.jsonline.com/sports/packers/george-halas-a-rival-on-the-field-helper-off-the-field-b99168706z1-237107831.html
"Believe me, Coach Halas loved to beat the Packers," said Mike Ditka, former Bears tight end and head coach. "I had no clue about the rivalry, but I quickly found out. Every year, we had to play them twice, and those were the most important games of the year to him." But Halas also had a soft spot for the league's smallest franchise. "Coach Halas had tremendous respect for Vince Lombardi," Ditka said. "There may not have been any (love lost with Curly Lambeau), but he had great respect for Lombardi and the Packers organization."
Halas and Lambeau, two competitive and impatient men with large egos, went head-to-head from 1921-'49, setting the tone for one of the greatest rivalries in professional sports. But Halas also greatly valued the survival of struggling franchises to ensure the NFL grew and prospered.
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Green Bay became an official professional franchise of the American Professional Football Association in 1921 (renamed the NFL in 1922), but lost the franchise after the first season due to illegal use of college players in a 20-0 loss to the Chicago Staleys (now Bears) on Nov. 27, 1921. Green Bay was expelled from the league during its winter meeting in January 1922. While it was Halas who was instrumental in bringing the infractions to the league's attention, he also fought to reinstate the Packers.
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Green Bay returned the favor in 1932, when the Chicago franchise was struggling. According to the Packers media guide and the Green Bay Press-Gazette, Halas accepted a $1,500 loan from the Packers to meet his payroll.
Much more at the link.