April 1972

Sunday 02:

North Vietnamese soldiers of the 304th Division take the northern half of Quang Tri Province.

Monday 03:

The first ever Mobile phone call is placed by Martin Cooper, in New York City

Wednesday 05:

Vietnam War: North Vietnamese forces invade Binh Long Province, launching a second front of the Nguyen Hue Offensive.

Thursday 06:

The first day of clear weather in three days allows American forces to start sustained air strikes and naval bombardments.

Thursday 13:

The Universal Postal Union decides to recognize the People's Republic of China as the only legitimate Chinese representative, effectively expelling the Republic of China administering Taiwan.

Sunday 16:

Vietnam War: Nguyen Hue Offensive – Prompted by the North Vietnamese offensive, the United States resumes bombing of Hanoi and Haiphong.

Tuesday 18:

The Roland Corporation is founded in Osaka, Japan.

Thursday 20:

Apollo 16 lands on the Moon.

Saturday 22:

Vietnam War: Increased American bombing in Vietnam prompts antiwar protests in New York City, San Francisco, and Los Angeles.

Thursday 27:

Constructive Vote of No Confidence against German Chancellor Willy Brandt fails under obscure circumstances.