Which event is commonly associated with the date December 7th in American history?

The event most commonly associated with December 7th in American history is the attack on Pearl Harbor, which occurred in 1941. This surprise military strike by the Japanese Navy against the naval base at Pearl Harbor, Hawaii, led to significant loss of life and damage to the U.S. Pacific Fleet. The attack had profound implications, ultimately resulting in the United States' entry into World War II the following day.

The significance of Pearl Harbor has been cemented in American memory and history as a pivotal moment. It is often described in historical contexts as a date that "will live in infamy," as famously stated by President Franklin D. Roosevelt when addressing Congress after the attack.

The other events listed, while historical and significant, do not correlate with December 7th. The first man on the moon occurred on July 20, 1969. The Declaration of Independence was adopted on July 4, 1776. The end of the Cold War is marked by various events in the early 1990s, none of which coincide with December 7th. This clear historical distinction reinforces why the attack on Pearl Harbor is the notable event associated with this specific date.