The one major warning sign at Pearl Harbor happened at approximately 6:30 that morning. As a ship entered the harbor a sailor on another ship thought he say a periscope trailing behind the ship. They were able to contact a nearby ship - the Ward - who confirmed seeing signs or a sub as well. They fired on the submarine sinking it. When the message was sent it was sent encoded that they had 'fired upon' an enemy ship. The telegram did not state straight out that there was a successful attack on another ship. If it had, if it had not been encrypted - those in harbor may have had a chance to prepare for the attack.
FDR - "A day that will live in infamy."
Japan bombed Pearl Harbour
No. Peal Harbor was full of destroyed US warships and was practically useless after the bombings it received.
Japan bombed Pearl Harbor without warning.
Answer. Increased U.S. intelligence (reconnaissance/spying) could have provided advanced warning of the Japanese attack on Pearl Harbor.
Do you mean, "What did the U.S do to japan before peal harbor?" and if so, the U.S imposed a trade embargo on Japan because Japan had invaded Indonesia. The trade embargo cut Japan's oil supplies quite a bit.
The 14th Amendment Western Expansion Railroads Wilson's Fourteen Points Peal Harbor World War I and World War II Progressivism
US standard traffic warning signs are yellow background with black symbols or letters. Traffic warning signs in other countries are generally white or yellow background with a red or black border in a triangular shape. Industrial warning signs are various colors, including OSHA and ANZI standards with orange background and black lettering. A yellow OSHA or ANZI sign would mean "caution" not "warning".
We were attacked, without any sort of warning when Japan attacked pearl harbor.
On 7 December 1941 it was still a US Territory and was having the worst kind of Bad Hair Day. The Empire of Japan was in the process of starting WW2 with an attack on Peal Harbor.
Because Japan bombed us without warning and caused almost unrepairable damage to Pearl Harbor.
The Japanese military leaders did. And Don't you forget it. Not only did they start the war, but they attacked the US without warning.