an American naval blockade of the Spanish colony of Cuba began. 1901–present 1901 – New York becomes the first U.S. state to require automobile license plates. 1915 – World War I: The Battle of Gallipoli begins: The invasion of the Turkish Gallipoli Peninsula by British, French, Indian, Newfoundland, Australian and New Zealand troops, begins with landings at Anzac Cove and Cape Helles. 1916 – Anzac Day is commemorated for the first time on the first anniversary of the landing at ANZAC Cove. 1920 – At the San Remo conference, the principal Allied Powers of World War I adopt a resolution to determine the allocation of Class "A" League of Nations mandates for administration of the former Ottoman-ruled lands of the Middle East. 1938 – U.S. Supreme Court delivers its opinion in Erie Railroad Co. v. Tompkins and overturns a century of federal common law. 1944 – The United Negro College Fund is incorporated. 1945 – Elbe Day: United States and Soviet reconnaissance troops meet in Torgau and Strehla along the River Elbe, cutting the Wehrmacht of Nazi Germany in two. 1945 – Liberation Day (Italy): The National Liberation Committee for Northern Italy calls for a general uprising against the German occupation and the Italian Social Republic. 1945 – United Nations Conference on International Organization: Founding negotiations for the United Nations begin in San Francisco. 1945 – The last German troops retreat from Finland's soil in Lapland, ending the Lapland War. Military acts of Second World War end in Finland. 1951 – Korean War: Assaulting Chinese forces are forced to withdraw after heavy fighting with UN forces, primarily made up of Australian and Canadian troops, at the Battle of Kapyong. 1953 – Francis Crick and James Watson publish "Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid" describing the double helix structure of DNA. 1954 – The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories. 1959 – The Saint Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping. 1960 – The United States Navy submarine completes the first submerged circumnavigation of the globe. 1961 – Robert Noyce is granted a patent for an integrated circuit. 1972 – Vietnam War: Nguyen Hue Offensive: The North Vietnamese 320th Division forces 5,000 South Vietnamese troops to retreat and traps about 2,500 others northwest of Kontum. 1974 – Carnation Revolution: A leftist military