In two sentences what was the Arms race.

The Arms race was a period of intense competition between the United States and the Soviet Union to develop and stockpile advanced weapons and military technology during the Cold War. Both sides sought to outdo each other in terms of military strength and capabilities, leading to a significant build-up of nuclear weapons.

Ok in one sentence tell what was the impact on the U.S.

The Arms race had a significant impact on the U.S., as it led to increased defense spending, heightened tensions with the Soviet Union, and a shift in military strategy towards nuclear deterrence.

Tell me what the significance of the attack on Pearl Harbor for the United States and the world in one sentence.

The attack on Pearl Harbor was a pivotal event that brought the United States into World War II and catalyzed global efforts to defeat the Axis powers.