The US never wanted to join World War II so they isolated themselves from everything that was going on and tried to stay neutral (Over time, we sided with the Allies). Mainly, we entered due to the Japanese attack on Pearl Harbor. After the bombing, the US decided to declare war on Japan. Soon after, Nazi Germany's leader declared war on the US and then the US was officially in the war.
So, all in all, it was the bombing of Pearl Harbor on December 7, 1941.
Hope this helps :)
B - A hoplite would alter their shield.
Their shield was made of wood, leather or bronze and could be decorated with inverted V-shape for the Spartan hoplites or the gorgon from Greek Mythology.
Geographical Spread. Islam spread from the Middle East to take hold across North Africa during the second half of the 7th century CE when the Umayyad Caliphate (661-750 CE) of Damascus conquered that area by military force
Chileans celebrate their independence on the 18th of September. Their road to independence from Spain started on that date in 1810. Although they would have to fight for eight more years to earn their total freedom, Chile celebrates the 18th of 1810 with great fanfare.