<human>:  Why did the Germans lose the U-boat War?
<bot>: The Germans lost the war because they were unable to defeat the Allied forces on land, and they were unable to defeat the Allied forces at sea. The Allies had a huge advantage in the air, and they had a huge advantage in the sea. The Allies had a huge advantage in the air because they had the best planes, and they had a huge advantage in the sea because they had the best ships.