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The Day the U.S. Entered WWII
84 Years Ago Today: The Pacific Changed Forever
Dear Reader,
It’s Sunday, December 7, 2025. I am Dom Einhorn, your lead curator, and here are your insights into what makes this day in history relevant today. First time reading? Join our community of intellectually curious readers who explore the history behind every day. [Sign up here]
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A Date Which Will Live in Infamy
👉 Marquee Event
December 7, 1941 — Pearl Harbor Attack
On this day in 1941, the United States naval base at Pearl Harbor on the island of Oahu, Hawaii, came under sudden attack by Japanese aircraft. The surprise military strike killed over 2,400 Americans, wounded more than 1,000, and destroyed or damaged numerous battleships and aircraft. Within 24 hours, the U.S. formally entered World War II. President Franklin D. Roosevelt famously declared it "a date which will live in infamy."
📌 Why This Matters
The attack on Pearl Harbor was a turning point in 20th-century history. Until then, the United States had remained officially neutral in the growing global conflict. But after the attack, public opinion shifted, and Congress declared war on Japan the very next day. The U.S. would go on to play a pivotal role in the defeat of the Axis powers. Pearl Harbor reshaped global alliances and permanently altered America’s role in world affairs.
🎯 How Much do you Know about the Attack on Pearl Harbor?
Although the attack was a major tactical victory for Japan, it failed to hit key infrastructure, such as oil depots and repair yards, which allowed the U.S. Pacific Fleet to recover faster than expected. In fact, all three U.S. aircraft carriers stationed in the Pacific were out at sea during the attack—none were damaged. Their survival proved critical in the battles that followed.
👉 Play our Attack on Pearl Harbor quiz now.
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Why KRONIKL? Inspired by the timeless concept of chronicles, KRONIKL is dedicated to bringing you the most intriguing, thought-provoking stories from this date. Culture, science, politics, and more — all condensed for a quick, insightful read that connects your present with our past.
*Disclosure: Masters of Trivia is a quiz platform founded by Dom Einhorn and owned by Intelligent Games LLC—the same company that brings you the KRONIKL newsletter.


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