Timely's Golden-Age heroes during World War II. Originally Marvel intended a giant-sized series which would have been half reprints. After one issue, a regular-sized series was used instead.
Cover letters credit confirmed by Todd Klein in The Danny Crespi Files Part 12, posted 23 June 2017 on his blog (Todd Klein's Blog at Goodreads). Previous indexer credited Gaspar Saladino.
Story takes place on December 22, 1941 and features Captain America and Bucky with a splash page depicting the Invaders vs Hitler. Captain America's origin is retold in detail, merging previous versions. For instance, Dr. Reinstein is revealed to be a code name for Dr. Erskine.
Some new or edited captions by Roy Thomas.