Editing 1948 (section)

===March===
{{Main|March 1948}}
* [[March 8]] &ndash; ''[[McCollum v. Board of Education]]'': The [[United States Supreme Court]] rules that religious instruction in public schools violates the [[United States Constitution|U.S. Constitution]].
* [[March 12]] &ndash; The [[Costa Rican Civil War]] begins.
* [[March 17]]
** The [[Treaty of Brussels]] is signed by Belgium, France, Luxembourg, the Netherlands and the United Kingdom, providing for economic, social and cultural collaboration and collective self-defence.
** The [[Hells Angels]] motorcycle gang is founded in [[California]].
* [[March 18]] &ndash; The Round Table Conference convenes in [[The Hague]], Netherlands, to prepare the decolonization process for the Caribbean island of [[Aruba]] and the other Dutch Colonies. Aruba presents the mandate of the Aruban People for Aruba to become an independent country, under the sovereignty of the House of Orange, based on Aruba's first state constitution presented officially since August 1947, and a (4th) member state of the future Dutch Commonwealth.
* [[March 20]]
** [[Colony of Singapore|Singapore]] holds its first elections.
** Renowned Italian conductor [[Arturo Toscanini]] makes his television debut, conducting the [[NBC Symphony Orchestra]] in an all-[[Richard Wagner|Wagner]] program in the United States.
** The [[20th Academy Awards]] Ceremony is held in Los Angeles. ''[[Gentleman's Agreement]]'' wins the [[Academy Award for Best Picture]].
*[[March 25]] &ndash; The [[American trusteeship proposal for Palestine|United States Proposal for Temporary United Nations Trusteeship for Palestine]] is announced by [[Harry S. Truman]].