6. Why does President Roosevelt think that the attack on Pearl Harbor was "deliberately planned many days or even weeks ago"?​

Because the Japanese wanted to control the pacific ocean which the Americans controlled so it was expected for them to contest the dominating power.

Explanation:

is there multiple

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.