How did the allies fight the german u-boat threat?

There were a few actions the Allies did to counter the threat of German submarines in World War I and in World War II. ... In both World War I and World War II, we used the convoy system to protect our merchant marine. Our navy accompanied our merchant and troop transport ships across the ocean

Explanation:

The House of Represenatives passed the declaration to take Gremany to the first WW1.

Explanation: From what I'm reading online, it states that the German U-Boat's sank 4 U.S. ships. Which bassically brought the House of representives to vote to bring the U.S. to the first World War with Germany. Now I'm not to sure this is the best answer I just read about the U-Boats on history.Com Hopefully this helps.

they united the colonies in their fight against the british.

what precedent do you see the ordinance of 1787 setting for the 1st amendment of the us constitution : )

this person under me, copied me. owo