The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1943, New Series, Vol. 38, No. 4.
The title and cover scene have nothing to do with the story in this issue
As is often the case with FH comics, the cover has nothing to do with the story in the issue. There's no 'blood vengeance', there's no 'lightning legion', and there's no scene matching the cover.
title is from the cover