The 1940 National Challenge Cup was the 27th edition of the United States Football Association's annual open cup. Today, the tournament is known as the Lamar Hunt U.S. Open Cup. Teams from the American Soccer League II competed in the tournament, based on qualification methods in their base region.
The tournament was unique in that it is the only edition not to produce an overall winner. After drawing 2-2 on aggregate, Baltimore S.C. and Chicago Sparta could not agree on a third, tie-breaking match. As a result, the two clubs shared the title.
References
1940 National Challenge Cup Wikipedia(Text) CC BY-SA