- Mar 1 Dominica & St Lucia gain independence from Britain
- Mar 1 US House of Representatives expels Rep Adam Clayton Powell Jr (307 to 116)
- Mar 1 Queen Elizabeth Hall in London's South Bank Centre opens
- Mar 2 US performs nuclear test at Nevada Test Site
- Mar 3 Grenada gains partial independence from Britain
- Mar 3 US performs nuclear test at Nevada Test Site
- Mar 4 Ice Pairs Championship at Vienna won by Belousova & Protopopov (USSR)
- Mar 6 Jimmy Hoffa enters Lewisburg Federal Prison
- Mar 6 Joseph Stalin's daughter Svetlana Allilujeva approaches the US Embassy in New Delhi, India, and asks for political asylum
- Mar 7 Teamster president Jimmy Hoffa begins 8-year jail sentence for defrauding the union & jury tampering (commuted Dec 23, 1971)
John F. Kennedy
- Mar 15 Allied Forces Central Europe (AFCENT)-headquarter moves to Brunssum
- Mar 15 Marshal Arturo da Costa e Silva sworn in as President of Brazil
- Mar 16 Pirate Radio Station 333 (Radio Britain) ship breaks down
- Mar 18 Oil tanker Torrey Canyon hits a rock off Cornwall & spills oil
- Mar 19 French Somaliland (Djibouti) votes to continue association with France
- Mar 24 University of Michigan holds 1st "Teach-in" after bombing of North Vietnam
- Mar 25 USSR performs nuclear test at Eastern Kazakh/Semipalitinsk USSR
- Mar 25 Who & Cream make US debut at Murray the K's Easter Show
- Mar 26 21st Tony Awards: Homecoming & Cabaret win
- Mar 28 UN Secretary General U Thant makes public proposals for peace in Vietnam