When did the German, Italian, and Japanese navies realize they might not succeed?
Short answerJapan and Italy recognized the unfavorable odds early, while Germany sought to force British negotiations rather than win a conventional naval victory.
NotesJapanese leaders broadly understood from the outset that a war with the United States might be unwinnable. German strategy relied less on outright naval victory than on inflicting enough damage to bring Britain to negotiations. The Regia Marina expected to face both the Royal Navy and French Navy in the Mediterranean and did not anticipate France's rapid collapse. Early German victories in Norway and France temporarily concealed how unfavorable the underlying maritime balance remained.