Instinctive behavior occurs when an animal has a particular internal state while it is in the presence of a specific external stimulation called a releaser or a sign stimulus.
How many ships did the U-boats sink? During the war the U-boats sank about 2,779 ships for a total of 14.1 million tons GRT. This figure is roughly 70% of all allied shipping losses in all theatres of the war and to all hostile action. The most successful year was 1942 when over 6 million tons of shipping were sunk in the Atlantic.
There is another similarity with these two warsâfanaticism and suicide tactics. While Japan apparently did not use suicide tactics at Pearl Harbor, we know of their use of the Kamikaze later in the war. One historian stated that by the end of WWII: 7,465 Kamikazes flew to their deaths; 120 US ships were sunk, with many more damaged 3,048 allied sailors were killed and anther 6,025 wounded Although there may be some question about the exact numbers, the damage done by Kamikazes is almost unbelievable.