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what are details of u-boats

U-boat is just the English version of Unterseeboot or undersea boat, The typical U-boat was 214 feet long, carried 35 men and 12 torpedoes, and could travel underwater for two hours at a time. The Germans used U-boats to attack all ships going to the British

Explanation:

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.

b. florence

d. milan