The Twenty-third Amendment to the United States Constitution is ratified, allowing residents of Washington, D.C., to vote in presidential elections. Date: March 29, 1961 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1961 📅 On This Day (Today)

Arturo Frondizi, the president of Argentina, is overthrown in a military coup by Argentina's armed forces, ending an 11+1⁄2 day constitutional crisis. Date: March 29, 1962 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1962 📅 On This Day (Today)

The funeral of Yuri Gagarin, the first man in space, begins in Moscow, with thousands of people in attendance. Date: March 29, 1968 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1968 📅 On This Day (Today)

My Lai massacre: Lieutenant William Calley is convicted of premeditated murder and sentenced to life in prison. Date: March 29, 1971 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1971 📅 On This Day (Today)

Operation Barrel Roll, a covert American bombing campaign in Laos to stop communist infiltration of South Vietnam, ends. Date: March 29, 1973 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1973 📅 On This Day (Today)

Vietnam War: The last United States combat soldiers leave South Vietnam. Date: March 29, 1973 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1973 📅 On This Day (Today)

The Terracotta Army is discovered in Shaanxi province, China. Date: March 29, 1974 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1974 📅 On This Day (Today)

NASA's Mariner 10 becomes the first space probe to fly by Mercury. Date: March 29, 1974 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1974 📅 On This Day (Today)

Quebecair Flight 255 crashes after takeoff from Québec City Jean Lesage International Airport in Quebec City, killing 17. Date: March 29, 1979 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1979 📅 On This Day (Today)

The Canada Act 1982 receives the Royal Assent from Queen Elizabeth II, setting the stage for the Queen of Canada to proclaim the Constitution Act, 1982. Date: March 29, 1982 Read more on Wikipedia → 📅 Other events on March 29 📅 Events on this day in 1982 📅 On This Day (Today)