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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for WWII menace:

EBOAT: WWII menace
UBOAT: Unseen WWII menace
XXXXXX: WWII menaces
UBOAT: WWII naval menace
UBOAT: Marine menace of WWII
UBOAT: WWII maritime menace
UBOAT: WWII sea menace
UBOAT: WWII convoy menace