Was thought to have been used in the phrase
"Tora! Tora! Tora!
" during the Japanese attack
at Pearl Harbor
in 1941. However, Japanese historians
have shown that it was not so. What was said sounded
like "Tora! Tora! Tora!"; but was in fact two different code words
-- "To" and "Ra".
"To" indicated that the attack had begun, and "Ra" that success had been achieved.
When said in great speed and excitement, this apparently sounded like "Tora! Tora! Tora!" to the American radio operators.