March 21, 1965 — Dr. Martin Luther King Jr. leads 3,200 people on the start of the third, and finally successful, civil rights march from Selma to Montgomery, Alabama.
March 20, 1942 — General Douglas MacArthur—at Terowie, South Australia—makes his famous speech regarding the fall of the Philippines in which he says: “I came out of Bataan and I shall return”.
March 19, 1945 — Adolf Hitler issues The Nero Decree—officially titled Demolitions on Reich Territory Decree—ordering the destruction
March 18, 1965 — The first spacewalk took place as Soviet cosmonaut Aleksei Leonov left his Voskhod 2 capsule, secured by a tether, and remained outside the spacecraft for 20 minutes.
March 17, 1973 — The Pulitzer Prize-winning photograph—Burst of Joy—is taken, depicting a former American prisoner of war being reunited with his family, which came to symbolize the end of United States involvement in the Vietnam War.
March 16, 1968 — Vietnam War: My Lai Massacre occurs; between 347 and 500 Vietnamese villagers (men, women, and children) are killed by American troops.
March 15, 1965 — President Lyndon B. Johnson, responding to the Selma crisis, tells U.S. Congress “We shall overcome” while advocating the Voting Rights Act.
March 14, 1969 — US Supreme Court Justice Abe Fortas resigned under pressure for the acceptance of an allegedly illegal payment from a former business associate.
March 13, 1962 — Lyman Lemnitzer, chairman of the Joint Chiefs of Staff, delivers a proposal to Secretary of Defense Robert McNamara, called Operation Northwoods, regarding performing terrorist attacks upon Guantanamo Bay Naval Base and blaming it on the Cuban government in order to justify a war against Cuba. The proposal is scrapped and President John F. Kennedy removes Lemnitzer from his position.
March 12, 1975 — Maurice Stans, former Nixon Cabinet member, was fined $5,000 after pleading guilty to three counts of violating the reporting sections of the Federal Election Campaign Act and two counts of accepting illegal campaign contributions.