German submarines attacked and sunk the Lusitania, a British passenger ship. This killed 128 Americans and created tensions between America and Germany.
Germany sent a telegram to Mexico to attack the United States. The United Kingdom was able to intercept the telegram and showed it the United States. The Zimmerman Telegram was the last straw for the United States.
Anne Frank was a perfect and regular girl. She went to school and everything. Suddenly, the Germans began World War 2, and things flipped around for her and the whole Europe. She was a young girl, and she had a sister.
In October 1973, the United States of America was perhaps the largest economic crisis since World War II.
Six days after the start of the Yom Kippur war, US President Nixon approved military assistance to Israel worth $ 2.2 billion after the Soviet Union did an identical thing to the Arab states.
The embargo did not last long on the scene and was taken down in March 1974, but due to the earlier crisis, oil prices remained high. Contrary to expectations, the state introduced several new laws, such as safety standards (which only increased the dimensions of already tall cars) and the so-called "Clear Air Act", aimed at reducing smog rates.