March 21

This Day in History

Vietnam War

Mar 21, 1972:

Khmer Rouge shell Phnom Penh

In Cambodia, more than 100 civilians are killed and 280 wounded as communist artillery and rockets strike Phnom Penh and outlying areas in the heaviest attack since the beginning of the war in 1970. Following the shelling, a communist force of 500 troops attacked and entered Takh Mau, six miles southeast of Pnom Penh, killing at least 25 civilians.

Fact Check We strive for accuracy and fairness. But if you see something that doesn't look right, contact us!

What Happened on Your Birthday?

Pick a Date

Shop HISTORY

  • 9/11 10th Anniversary DVD Set

    9/11 10th Anniversary DVD Set

    Exclusive. History commemorates the 10th anniversary of the attacks on New York’s World Trade Center with three new special programs.

  • Vietnam in HD DVD Set

    Vietnam in HD DVD Set

    Their story is in danger of being lost to history. This six-hour miniseries spans the massive initial troop build-up in 1965 to the fall of Saigon a decade later.