Mar. 29. 1962: Military coup topples civilian government in Argentina. 1987: Vietnam Veterans For Peace marching from Jinotega reach Wicuili, Nicaragua.

Mar. 30. 1972: Great Britain imposes direct rule on Northern Ireland. 1986: 80,000 demonstrate against nuclear power, Wackersdorf, West Germany.

Mar. 31. 1927: Birth of nonviolent activist and labor organizer Cesar Chavez 20 miles north of Yuma, Ariz.

Apr. 1. 1866: Congress overrides Pres. Andrew Johnson's veto of Civil Rights Bill and gives equal rights to all men born in the U.S. except Indians. 1955: Boycott of segregated schools begins, South Africa.

Apr. 2. 1966: 100,000 Vietnamese demonstrate in Da Nang against U.S. and South Vietnamese governments. Civil unrest spreads to Hue and Saigon.

Apr. 3. 1969: Blacks riot in Chicago in response to police brutality. 1980: Congress reinstates the Shvwits, Kanosh, Koosharem, and Indian Peaks and Cedar City bands of Paiute Indians of Utah.

Apr. 4. 1914: Unemployed riot in Union Square, New York City. 1996: Four arrested in New York City during march in support of political prisoners in U.S.

Apr. 5. 1208: Quetzalcoatl, Toltec king, priest, astronomer and culture-hero, dies; he reduced Mayan calendar and appendices to a system of signs and ideographs which fitted all languages equally. 1992: Over 500,000 march on Washington, D.C. to support women's reproductive rights and equality.

Apr. 6. 1952: Mass meetings of non-whites to protest againt apartheid, South Africa. 1994: Plane crash killing presidents of Rwanda and Burundi initiates massacre of millions of Tutsis by Hutus in Rwanda.

Apr. 7. 1948: World Health Organization (WHO) formed in Geneva, with the stated goal of making health care available to everyone in the world by the year 2000. 1968: 9,000 attend a Seattle memorial for Martin Luther King, Jr., slightly fewer than would attend the 1994 memorial following the death of Kurt Cobain.

Apr. 8. 563 BC: Birth of Gautama Buddha. 1973: A Harris Poll reports 51% in U.S. support the American Indian Movement protesters occupying Wounded Knee; 21% support the federal government.

Apr. 9. 1947: First day of Freedom Ride, the "Journey of Reconciliation," sponsored by Congress for Racial Equality and Fellowship of Reconciliation, from Washington, D.C. through four southern states.

Apr. 10. 1947: Jackie Robinson appears in first game with the Brooklyn Dodgers, becoming the first African-American to play major league baseball after 78 years of segregation. The game, until a franchise moved to Atlanta in the mid-1960s, was played entirely in northern cities.

Apr. 11. 1986: 17 are arrested on felony riot charges after police tear-gas striking Hormel meat-packing workers in Austin, Minn. 6,000 (in a city of 20,000) demonstrate the next day. The Hormel strike, generally regarded as labor's first major grassroots revolt against corporate downsizing, is eventually suppressed by Hormel in cooperation with both the state and the workers' own national union.