The bombing in tokyo is usually referred to a firebombing raids. Damage to Tokyo's industry was slight until firebombing destroyed much of the light industry that was used as an integral source for small machine parts and tim intensive processes. The destruction and damage was specially severe in the eastern areas of the city.
Answer: In 1917, Germany, determined to win its war of attrition against the Allies, announced the resumption of unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American liner Housatonic was sunk by a German U-boat.
The Earth rotates once every 23 hours and 56 minutes...hope this helps