The sinking of the and germanys continuted use of unrestrected warfare brought the u. s into the war in 1917.

byzantine empire is the answer i think you are looking for.

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answer: in october 1962, an american u-2 spy plane secretly photographed nuclear missile sites being built by the soviet union on the island of cuba. president kennedy did not want the soviet union and cuba to know that he had discovered the missiles. he met in secret with his advisors for several days to discuss the problem.

explanation: