Sixty-eight years ago, more than 2,000 Americans were killed and another 1,000 injured when the Japanese Navy attacked the U.S. naval base at Pearl Harbor in Hawaii.

On Monday, the nation is remembering the lives lost.

President Franklin D. Roosevelt remembered December 7, 1941 as “a date that will live in infamy.” That’s how he reacted the next day to the attack. It would be the event that would take the United States into World War II.

Just before 8 o’clock on a Sunday morning, nearly 400 Japanese war planes attacked the home port of the United States pacific fleet. The results were devastating.

Five battleships, three destroyers, and seven other ships were sunk or severely damaged. More than 200 hundred aircraft were destroyed and some 2400 Americans were killed that day.

In the four years that followed, more than 400-thousand Americans lost their lives in World War II.

Indiana and Michigan, as in most states, flags will be flown at half-staff Monday honoring the fallen. Those orders were given by governors Mitch Daniels and Jennifer Granholm.

December 7th was first declared "Pearl Harbor Remembrance Day" in 1942, a year after the attack.

If you'd like to learn more about the attack on Pearl Harbor, National Geographic has an interactive look at what happened on that Sunday in 1941. Just click on the Big Red Bar.