Answer:
Travelers and messengers spread the art of iron working. -Iron working was spread through trade. Iron working technology led to the expansion of agriculture. Iron-working technology intensified warfare between communities due to the production of iron weapons.
The correct answer to this question is Japan bombed the Pearl Harbor. The time when Japan bombed the Pearl Harbor got the United States to finally enter the war. Although the war has begun with the Germany's invasion of Poland, the United States agreed to stay out of it. However, everything changed on December 7, 1941, a date that every American will never forget.
low moral and the cival war endangered lincoln's re-election and if he lost the confederates could of won the civil war as the other candidate lincon was fighting was more sympathetic and did not like to take risks he would of probably signed a peace treaty with the CSA.