Why did the germans resort to unrestricted submarine use?

Was the battle of iwo jima over after us troops raised the flag on mt. suribachi?

What is the main reason the united states removed the taliban from power shortly after the september 11 2001 attacks ?

Plz , ive been stuck on this forever. what action did president jefferson take to stop britain and france from seizing american merchant ships. a. he declared war on france. b. he called for increased tariffs on british and french goods. c. he called for embargo on all foreign trade. d. he declared war on britain.