Was the attack on Pearl Harbor a Japanese military success?

"At first, however, the Pearl Harbor attack looked like a success for Japan. Its bombers hit all eight U.S. battleships, sinking four and damaging four others, destroyed or damaged more than 300 aircraft and killed some 2,400 Americans at Pearl Harbor." But the United States responded to the Japanese attack on the pearl harbor by declaring war on japan and all of its allies by dropping two atomic bombs on two of Japans' cities.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

d. migration