Scripted/laid-out by Will Eisner, and penciled/inked by Chuck Cuidera, the second appearance of Blackhawk, from Quality's Military Comics #2 (1941) clears up a number of aspects, including the fact the team isn't operating openly as a part of the Allied forces!
(America hadn't entered the war at this pre-Pearl Harbor point in history,)
Besides the core group, we're introduced to
Boris (Ukrainian/Russian) and
Zeg (country unknown) along with numerous other unidentified personnel.
Zeg appeared several more times during the Golden Age, but Boris disappeared after this issue, popping up again in the Bronze Age as a one-shot villain seeking vengeance against the Blackhawks!
Trivia: Though this was the only appearance of the split-tail
Skyrockets in the Golden Age strip, when the
Blackhawks made their debut in the animated
Justice League series in "The Savage Time", an episode set in post D-Day Europe, the
original version of the aircraft was front and center!
(
DC's 1980s revival of the WWII version of
Blackhawk restored the split-tailed version to pre-
Crisis on Infinite Earths continuity, helping to define which WWII stories were Earth-One and which were Earth-X)!
Director/Animator Dan Riba even constructed a custom maquette of the Skyrocket and sent it to the Korean animation house for reference in animating aerobatics with the distinctive ship properly!