The Pearl Harbor attacks very large amount of damage, despite its duration of just two hours. 21 ships of the United States Pacific Fleet were either sunk or damaged. 188 airplanes were destroyed, and 159 were damaged. There were 2,403 American casualties, 68 of which were civilians. On the other side, only Japanese 29 planes (10% of the attacking force) were destroyed. In the end, all but three US ships damaged were repaired.