This series takes place in both World War II and the present. William Bryon (Young Avenger) appears in both time periods in this issue.
William Bryon's age is implied to be 93 in this issue, but it is explicitly stated to be 91 in issue #2 ("I'll be ninety-two years old next March").
Page 2, panel 2 shows five Victory Boys. Page 2, panel 3 appears to show six Victory Boys. There are seven known Victory Boys: Piotr, Hans, Victor, Kurt Erzberger, Maxie Stein, Gus Weber, and Warren Zumwald. Only Piotr is identified by name in this series. It is likely that six of these seven members are the characters who were killed in this issue. Piotr is said to be the cousin of William Bryon (Young Avenger).
In this issue, Invisible Man's secret identity is given as William D. Gade. In issue #2, it is given as Harry Gade. In Marvel Mystery Handbook: 70th Anniversary Special (Marvel, 2009 Series) #1, it was given as Leonard Gade.
¤ Archie the Gruesome last appeared in Comedy Comics [Marvel, 1942 series] #10 (June 1942).
¤ Blue Diamond's final golden age appearance was in Daring Mystery Comics [Marvel, 1940 series] #8 (January 1942), last appeared in Captain America: Patriot [Marvel, 2010 series] #1 (November 2010).
¤ Captain Strong last appeared in Daring Mystery Comics [Marvel, 1940 series] #3 (April 1940).
¤ Flash Foster last appeared in Daring Mystery Comics [Marvel, 1940 series] #1 (January 1940).
¤ Invisible Man last appeared in Mystic Comics [Marvel, 1940 series] #4 (July/August 1940).
¤ Merzah the Mystic last appeared in Mystic Comics [Marvel, 1940 series] #4 (July/August 1940).
¤ Slow-Motion Jones last appeared in USA Comics [Marvel, 1941 series] #8 (May 1943).
¤ Taxi Taylor last appeared in Mystic Comics [Marvel, 1940 series] #2 (April 1940).
¤ Victory Boys last appeared in USA Comics [Marvel, 1941 series] #5 (Summer 1942).
¤ Young Avenger last appeared in USA Comics [Marvel, 1941 series] #1 (August 1941).