The text says that the US was in a period of peace with Japan when the attack occurred. So the attack was unexpected, because as the two countries were at peace, there was no way the US could expect an attack that would cause such great damage.
In the scenario, the ideas in the passage that are similar to the idea of Poe in the 3rd line of Annabel Lee would be that both describe unexpected misfortune. Hope this is the answer and this would be of big help.
